Add partial purge timeout support in gRPC proto mapping

[YunchuWang]

Summary

Map the new timeout proto field in PurgeInstanceFilter to DTFx's PurgeInstanceFilter.Timeout, and forward PurgeResult.IsComplete back to the proto response. This enables the isolated worker SDK's partial purge feature to work end-to-end through the gRPC boundary.

Motivation

The isolated worker SDK communicates with the Functions host via gRPC. When purging large numbers of instances, the gRPC call times out before the host-side purge completes, causing:

1. OperationCanceledException on the host side
2. RpcException(StatusCode.Internal) on the worker side
3. Deleted count = 0 reported (even though rows were actually deleted)

With this change, the SDK can pass a timeout through the proto, and the host maps it to DTFx's PurgeInstanceFilter.Timeout. The purge stops within the timeout, returns accurate counts, and sets isComplete = false so the caller knows to loop.

Changes

• Proto: Add google.protobuf.Duration timeout = 4 to PurgeInstanceFilter message
• ProtobufUtils.ToPurgeInstanceFilter: Map proto timeout → DTFx PurgeInstanceFilter.Timeout
• ProtobufUtils.CreatePurgeInstancesResponse: Map DTFx PurgeResult.IsComplete → proto isComplete (bug fix — was previously not being set despite field existing in proto)

Breaking Changes

None. Additive proto field + bug fix for existing but unpopulated response field.

Dependencies

• Proto: Add timeout field to PurgeInstanceFilter for partial purge support microsoft/durabletask-protobuf#66
• SDK: Add Timeout support to PurgeInstancesFilter for partial purge microsoft/durabletask-dotnet#679
• DTFx: Enhance purge with parallel batch deletes and partial purge timeout durabletask#1321

Benchmark Results (500K instances, EP1, isolated worker)

Metric	Without timeout	With timeout (25s)
Reported deleted	17,402 (3.5%)	499,560 (99.9%)
Errors	41 (95% failure)	0
Purge rate	12.3 inst/s	318.1 inst/s

Replaces #3397 (which had unrelated agent changes).

[Copilot]

Pull request overview

This PR updates the host-side gRPC/proto mapping to support partial purge semantics by forwarding a purge timeout from the worker to DTFx and returning completion status back across gRPC. It also introduces new GitHub Actions workflows and agent instruction documents (which are not described in the PR summary and materially expand the PR scope).

Changes:

• Add timeout to PurgeInstanceFilter proto and map it to DTFx PurgeInstanceFilter.Timeout.
• Forward PurgeResult.IsComplete into the gRPC purge response (isComplete).
• Add scheduled GitHub Actions workflows plus Copilot/agent instruction documents for automated verification and daily review.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 9 comments.

Show a summary per file

File	Description
src/WebJobs.Extensions.DurableTask/ProtobufUtils.cs	Maps proto timeout into DTFx purge filter; attempts to map purge completion into proto response.
src/WebJobs.Extensions.DurableTask/Grpc/Protos/orchestrator_service.proto	Adds google.protobuf.Duration timeout = 4 to PurgeInstanceFilter.
.github/workflows/pr-verification.yaml	Adds a scheduled PR verification agent workflow (Azurtite + Copilot CLI + label/comment automation).
.github/workflows/daily-code-review.yaml	Adds a scheduled daily code review agent workflow (build/test + Copilot CLI + PR/issue automation).
.github/copilot-instructions.md	Adds general AI assistant architectural guidance for the repo.
.github/agents/pr-verification.agent.md	Adds detailed instructions for the PR verification agent behavior.
.github/agents/issue-triage.agent.md	Adds detailed instructions for an issue triage agent behavior.
.github/agents/daily-code-review.agent.md	Adds detailed instructions for a daily code review agent behavior.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

You can also share your feedback on Copilot code review. Take the survey.

[Copilot]

Pull request overview

Updates the gRPC ↔ DTFx mapping layer in WebJobs.Extensions.DurableTask to better support partial purge scenarios by propagating additional purge result metadata back to gRPC callers.

Changes:

• Propagates PurgeResult.IsComplete into the gRPC PurgeInstancesResponse.isComplete field.
• Minor formatting/whitespace adjustments in ProtobufUtils event mapping blocks.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

You can also share your feedback on Copilot code review. Take the survey.

[Copilot]

Pull request overview

This PR extends the gRPC↔DTFx purge mapping to support partial purges by flowing a new timeout field from PurgeInstanceFilter into DurableTask.Core.PurgeInstanceFilter.Timeout, and by returning PurgeResult.IsComplete back to the gRPC response so callers can loop until completion.

Changes:

• Add google.protobuf.Duration timeout to the PurgeInstanceFilter proto message.
• Map proto timeout → DTFx PurgeInstanceFilter.Timeout in ProtobufUtils.ToPurgeInstanceFilter.
• Populate PurgeInstancesResponse.isComplete from PurgeResult.IsComplete, and add unit tests for isComplete mapping + basic purge-filter mapping.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
src/WebJobs.Extensions.DurableTask/Grpc/Protos/orchestrator_service.proto	Adds the new timeout field to the purge filter message.
src/WebJobs.Extensions.DurableTask/ProtobufUtils.cs	Implements request/response mapping for purge timeout and isComplete.
test/FunctionsV2/ProtobufUtilsTests.cs	Adds tests for isComplete propagation and basic purge filter conversions.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.