feat: Implement DataAnnotationsStreamQueryInterceptor (BCL validation for stream queries)

[Copilot]

• Create DataAnnotationsStreamQueryInterceptor<TQuery, TResponse> in src/NetEvolve.Pulse/Interceptors/
• Update DataAnnotationsExtensions.AddDataAnnotations() to register IStreamQueryInterceptor<,> alongside existing request and event interceptors
• Update XML docs on DataAnnotationsExtensions to mention stream queries
• Create unit tests in tests/NetEvolve.Pulse.Tests.Unit/DataAnnotations/Interceptors/DataAnnotationsStreamQueryInterceptorTests.cs
• Update DataAnnotationsExtensionsTests.cs to test stream query interceptor registration and idempotency
• Resolve merge conflicts with main (which added DataAnnotationsEventInterceptor) — all three interceptors (request, stream query, event) are now registered in AddDataAnnotations()
• Build succeeds with zero errors and zero warnings

[codecov]

Codecov Report

❌ Patch coverage is 94.11765% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 92.30%. Comparing base (b901aac) to head (9b840e3).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...erceptors/DataAnnotationsStreamQueryInterceptor.cs	90.90%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #409      +/-   ##
==========================================
+ Coverage   91.87%   92.30%   +0.42%     
==========================================
  Files         144      145       +1     
  Lines        5431     5448      +17     
  Branches      508      512       +4     
==========================================
+ Hits         4990     5029      +39     
+ Misses        296      272      -24     
- Partials      145      147       +2     

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[samtrion]

@copilot resolve the merge conflicts in this pull request

[Copilot]

@copilot resolve the merge conflicts in this pull request

Merge conflicts resolved in 5bacace. The conflict in DataAnnotationsExtensions.cs was between my stream query interceptor registration and the event interceptor registration added in main — both are now included alongside the existing request interceptor.