feat: Add multi2multivec-weaviate vectorizer support (#199)

[mpartipilo]

Summary

• Adds Multi2MultiVecWeaviate model record to Models/Vectorizer.cs with [Vectorizer("multi2multivec-weaviate", VectorType.MultiVector)]
• Image-only vectorizer: ImageFields, BaseURL, Model — no text fields
• Adds Multi2MultiVecWeaviate() factory method to VectorizerFactoryMulti
• Registers 19 new public API symbols in PublicAPI.Unshipped.txt

Closes #199. Reference: Python client PR #1857

Test Plan

• Test_Multi2MultiVecWeaviate_Serializes_ImageFields — verifies imageFields key, array value, and model value all serialize correctly
• All 731 unit tests pass

🤖 Generated with Claude Code

[orca-security-eu]

Orca Security Scan Summary

Status	Check	Issues by priority
Passed	Secrets	0   0   0   0	View in Orca

[github-actions]

Summary - Weaviate C# Client Coverage

Summary

Generated on:	02/27/2026 - 00:48:08
Coverage date:	02/27/2026 - 00:39:49 - 02/27/2026 - 00:47:28
Parser:	MultiReport (65x Cobertura)
Assemblies:	2
Classes:	318
Files:	205
Line coverage:	62% (12299 of 19830)
Covered lines:	12299
Uncovered lines:	7531
Coverable lines:	19830
Total lines:	52397
Branch coverage:	53.2% (2893 of 5431)
Covered branches:	2893
Total branches:	5431
Method coverage:	Feature is only available for sponsors

Coverage

Weaviate.Client - 60.7%

Name	Line	Branch
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Weaviate.Client.Models.GenerativeGroupByResult	100%
Weaviate.Client.Models.GenerativePrompt	100%
Weaviate.Client.Models.GenerativeProvider	83.3%
Weaviate.Client.Models.GenerativeReply	100%
Weaviate.Client.Models.GenerativeResult	20%	0%
Weaviate.Client.Models.GenerativeWeaviateGroup	100%
Weaviate.Client.Models.GenerativeWeaviateObject	100%
Weaviate.Client.Models.GenerativeWeaviateResult	100%
Weaviate.Client.Models.GeoCoordinate	100%
Weaviate.Client.Models.GeoCoordinateConstraint	0%
Weaviate.Client.Models.GroupByObject	100%
Weaviate.Client.Models.GroupByRequest	100%
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Weaviate.Client.Models.GroupByResult`2	100%
Weaviate.Client.Models.GroupedTask	100%
Weaviate.Client.Models.GroupRoleAssignment	0%
Weaviate.Client.Models.GroupsResource	100%
Weaviate.Client.Models.HnswDto	100%
Weaviate.Client.Models.HybridNearTextBuilder	68.8%
Weaviate.Client.Models.HybridNearVectorBuilder	60.9%
Weaviate.Client.Models.HybridVectorInput	91%	85.7%
Weaviate.Client.Models.HybridVectorInputBuilder	100%
Weaviate.Client.Models.InvertedIndexConfig	69%	72.7%
Weaviate.Client.Models.InvertedIndexConfigUpdate	80%	50%
Weaviate.Client.Models.JsonConverterEmptyCollectionAsNull	73.6%	50%
Weaviate.Client.Models.Metadata	100%
Weaviate.Client.Models.MetadataQuery	80.9%
Weaviate.Client.Models.MetaInfo	90.9%	50%
Weaviate.Client.Models.Metrics	84.8%	60%
Weaviate.Client.Models.ModelsToDtoExtensions	100%	85%
Weaviate.Client.Models.ModuleConfigList	16.6%	7.1%
Weaviate.Client.Models.Move	100%
Weaviate.Client.Models.MultiTenancyConfig	100%
Weaviate.Client.Models.MultiTenancyConfigUpdate	60%
Weaviate.Client.Models.MultiVectorDto	100%
Weaviate.Client.Models.MultiVectorEncodingDto	100%
Weaviate.Client.Models.MuveraDto	100%	100%
Weaviate.Client.Models.NamedVector	100%	100%
Weaviate.Client.Models.NearTextBuilder	100%
Weaviate.Client.Models.NearTextInput	100%
Weaviate.Client.Models.NearVectorBuilder	100%
Weaviate.Client.Models.NearVectorInput	54.5%
Weaviate.Client.Models.NestedFilter	100%
Weaviate.Client.Models.NodesResource	100%
Weaviate.Client.Models.NodeStatusExtensions	60%	20%
Weaviate.Client.Models.NotNestedFilter	100%
Weaviate.Client.Models.ObjectReference	80%
Weaviate.Client.Models.ObjectStorageBackend	0%
Weaviate.Client.Models.ObjectTTLConfig	97%
Weaviate.Client.Models.ObjectTTLConfigUpdate	89.6%	26.9%
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Weaviate.Client.Models.PropertyUpdate	25%
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Weaviate.Client.Models.ReferenceUpdate	0%
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Weaviate.Client.Models.ReplicationConfig	100%
Weaviate.Client.Models.ReplicationConfigUpdate	57.1%
Weaviate.Client.Models.ReplicationOperation	65%	50%
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Weaviate.Client.Models.ReplicationOperationStatus	37.5%	0%
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Weaviate.Client.Models.Rerank	100%
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Weaviate.Client.Models.RerankerConfigSerialization	56.8%	55%
Weaviate.Client.Models.RoleInfo	100%
Weaviate.Client.Models.RolesResource	100%
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Weaviate.Client.Models.ShardStatusExtensions	100%	50%
Weaviate.Client.Models.SimpleTargetVectors	100%
Weaviate.Client.Models.SinglePrompt	100%
Weaviate.Client.Models.Sort	100%	50%
Weaviate.Client.Models.SortExtensions	100%
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Weaviate.Client.Models.StopwordsConfigUpdate	57.1%	50%
Weaviate.Client.Models.TargetVectors	75.5%	0%
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Weaviate.Client.Models.TenantsResource	100%
Weaviate.Client.Models.TimeFilter	75%	25%
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Weaviate.Client.Models.Typed.DateMetricsAttribute	100%
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Weaviate.Client.Models.Typed.GenerativeWeaviateResult`1	0%
Weaviate.Client.Models.Typed.GroupByObject`1	0%
Weaviate.Client.Models.Typed.GroupByResult`1	0%
Weaviate.Client.Models.Typed.IntegerMetricsAttribute	100%
Weaviate.Client.Models.Typed.MetricsExtractor	81.5%	79.8%
Weaviate.Client.Models.Typed.NumberMetricsAttribute	100%
Weaviate.Client.Models.Typed.TextMetricsAttribute	100%
Weaviate.Client.Models.Typed.TypedResultConverter	20%	7.6%
Weaviate.Client.Models.Typed.WeaviateGroup`2	0%
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Weaviate.Client.Models.TypedGuid	66.6%
Weaviate.Client.Models.TypedValue`1	80%
Weaviate.Client.Models.User	0%
Weaviate.Client.Models.UserMetadata	0%
Weaviate.Client.Models.UserRoleAssignment	100%
Weaviate.Client.Models.UsersResource	100%
Weaviate.Client.Models.Vector	45.3%	28.1%
Weaviate.Client.Models.VectorBuilder	30%	27.7%
Weaviate.Client.Models.VectorConfig	82.7%	50%
Weaviate.Client.Models.VectorConfigList	59.3%	60%
Weaviate.Client.Models.VectorConfigUpdate	50%
Weaviate.Client.Models.VectorIndex	88.6%
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Weaviate.Client.Models.VectorIndexConfigUpdateDynamic	0%	0%
Weaviate.Client.Models.VectorIndexConfigUpdateFlat	40%
Weaviate.Client.Models.VectorIndexConfigUpdateHNSW	52.9%
Weaviate.Client.Models.VectorIndexMappingExtensions	86.5%	71.7%
Weaviate.Client.Models.VectorIndexSerialization	55.5%	42.3%
Weaviate.Client.Models.VectorInputBuilderFactories	100%	100%
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Weaviate.Client.Models.VectorizerAttribute	100%
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Weaviate.Client.Models.Vectors	37.5%	100%
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Weaviate.Client.Models.WeaviateGroup`1	80%
Weaviate.Client.Models.WeaviateObject	88.8%
Weaviate.Client.Models.WeaviateObjectExtensions	95.6%	75%
Weaviate.Client.Models.WeaviateResult	100%
Weaviate.Client.Models.WeaviateResult`1	100%
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Weaviate.Client.Models.WeightedTargetVectors	100%	100%
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Weaviate.Client.NearMediaInput	100%
Weaviate.Client.NodesClient	87.5%	50%
Weaviate.Client.OAuthConfig	0%
Weaviate.Client.OAuthTokenService	0%	0%
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Weaviate.Client.QueryClientHybridExtensions	48.8%	25%
Weaviate.Client.QueryClientNearTextExtensions	74.2%	75%
Weaviate.Client.ReplicationsClient	87%	51.7%
Weaviate.Client.RerankerConfigFactory	14.2%	100%
Weaviate.Client.Rest.EnumMemberJsonConverter`1	0%	0%
Weaviate.Client.Rest.EnumMemberJsonConverterFactory	0%
Weaviate.Client.Rest.HttpResponseMessageExtensions	90.2%	62.5%
Weaviate.Client.Rest.InvalidEnumWireFormatException	0%
Weaviate.Client.Rest.WeaviateEndpoints	78.5%	75.8%
Weaviate.Client.Rest.WeaviateRestClient	89.5%	53.3%
Weaviate.Client.Rest.WeaviateRestClientException	50%	25%
Weaviate.Client.Rest.WeaviateRestServerException	0%	0%
Weaviate.Client.Rest.WeaviateUnexpectedStatusCodeException	100%
Weaviate.Client.RetryPolicy	81.2%	50%
Weaviate.Client.RolesClient	90.3%	50%
Weaviate.Client.Serialization.Converters.BlobPropertyConverter	58.8%	37.5%
Weaviate.Client.Serialization.Converters.BoolPropertyConverter	80%	50%
Weaviate.Client.Serialization.Converters.DatePropertyConverter	51.3%	36.8%
Weaviate.Client.Serialization.Converters.GeoPropertyConverter	52.2%	23.6%
Weaviate.Client.Serialization.Converters.IntPropertyConverter	66.6%	50%
Weaviate.Client.Serialization.Converters.NumberPropertyConverter	64.7%	47%
Weaviate.Client.Serialization.Converters.ObjectPropertyConverter	18%	7.3%
Weaviate.Client.Serialization.Converters.PhonePropertyConverter	51.8%	33.3%
Weaviate.Client.Serialization.Converters.TextPropertyConverter	75%	75%
Weaviate.Client.Serialization.Converters.UuidPropertyConverter	61.1%	37.5%
Weaviate.Client.Serialization.PropertyBag	28.9%	20.7%
Weaviate.Client.Serialization.PropertyConverterBase	65.3%	50%
Weaviate.Client.Serialization.PropertyConverterRegistry	78.1%	70.1%
Weaviate.Client.TenantsClient	84.5%	37.5%
Weaviate.Client.Typed.TypedCollectionClient`1	95.5%	50%
Weaviate.Client.Typed.TypedDataClient`1	49%
Weaviate.Client.Typed.TypedGenerateClient`1	0.8%	0%
Weaviate.Client.Typed.TypedGenerateClientHybridExtensions	0%
Weaviate.Client.Typed.TypedQueryClient`1	10.6%	100%
Weaviate.Client.Typed.TypedQueryClientHybridExtensions	0%
Weaviate.Client.UsersClient	89.4%	66.6%
Weaviate.Client.UsersDatabaseClient	100%	62.5%
Weaviate.Client.UsersOidcClient	4.5%
Weaviate.Client.Validation.TypeValidationException	55.5%
Weaviate.Client.Validation.TypeValidator	75.7%	75%
Weaviate.Client.Validation.ValidationError	83.3%
Weaviate.Client.Validation.ValidationResult	100%	100%
Weaviate.Client.Validation.ValidationWarning	75%
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Weaviate.Client.VectorizerFactory	6%
Weaviate.Client.VectorizerFactoryMulti	25%
Weaviate.Client.WeaviateAuthenticationException	100%	100%
Weaviate.Client.WeaviateAuthorizationException	100%	100%
Weaviate.Client.WeaviateBackupConflictException	100%
Weaviate.Client.WeaviateBadRequestException	100%	100%
Weaviate.Client.WeaviateClient	80.3%	57.9%
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Weaviate.Client.WeaviateExtensions	78.2%	55.4%
Weaviate.Client.WeaviateExternalModuleProblemException	100%	100%
Weaviate.Client.WeaviateFeatureNotSupportedException	100%	100%
Weaviate.Client.WeaviateModuleNotAvailableException	100%	100%
Weaviate.Client.WeaviateNotFoundException	14.8%	0%
Weaviate.Client.WeaviateServerException	66.6%
Weaviate.Client.WeaviateTimeoutException	100%	100%
Weaviate.Client.WeaviateUnprocessableEntityException	100%	100%

Weaviate.Client.Analyzers - 91.4%

Name	Line	Branch
Weaviate.Client.Analyzers	91.4%	73%
Weaviate.Client.Analyzers.AggregatePropertySuffixAnalyzer	90%	66.6%
Weaviate.Client.Analyzers.AutoArrayUsageAnalyzer	95.4%	71.4%
Weaviate.Client.Analyzers.HybridSearchNullParametersAnalyzer	90.2%	78.5%
Weaviate.Client.Analyzers.VectorizerFactoryAnalyzer	94.3%	82.7%