Wire optimizer into server startup and CLI

[therealnb]

Summary

This PR integrates the optimizer into the vMCP server, enabling semantic tool discovery at runtime.

This is part 2 of a 3-part PR split from #3440:

• PR 1: Non-functional packages, deps, config schema
• PR 2 (this): Integration/wiring into server startup
• PR 3: Documentation and examples

Depends on: #3516 (PR 1)

Changes

Server Integration

• Update server.go to use CreateOptimizerToolsFromProvider
• Add capability_adapter.go optimizer support
• Add pkg/vmcp/server/optimizer_test.go

CLI Integration

• Wire optimizer initialization in cmd/vmcp/app/commands.go

Operator Integration

• Add operator controller support for optimizer config
• Update vmcpconfig/converter.go for optimizer settings

Build System

• Update Taskfile.yml with optimizer build flags

Cleanup

• Delete dummy_optimizer.go (replaced by EmbeddingOptimizer)
• Delete dummy_optimizer_test.go

Test Updates

• Update health checker and monitor tests
• Update discovery middleware tests
• Update E2E tests for optimizer integration

Test Plan

• Unit tests pass
• Integration tests pass
• E2E tests pass with optimizer enabled
• Manual testing of optimizer mode

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[jerm-dro]

Closing, since this will be replaced by the linked tasks above.