[Redis] Add schema URL to traces

[martincostello]

Contributes to #4064.

Changes

Add schema URL to the ActivitySource.

Merge requirement checklist

• CONTRIBUTING guidelines followed (license requirements, nullable enabled, static analysis, etc.)
• Unit tests added/updated
• Appropriate CHANGELOG.md files updated for non-trivial changes
• Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.86%. Comparing base (a545405) to head (38b09ab).
⚠️ Report is 74 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4095      +/-   ##
==========================================
+ Coverage   73.85%   73.86%   +0.01%     
==========================================
  Files         459      459              
  Lines       18327    18335       +8     
==========================================
+ Hits        13535    13543       +8     
  Misses       4792     4792              

Flag	Coverage Δ
unittests-Instrumentation.StackExchangeRedis	93.78% <100.00%> (+0.15%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...mentation/RedisProfilerEntryToActivityConverter.cs	93.00% <100.00%> (+0.30%)	⬆️
...dis/StackExchangeRedisConnectionInstrumentation.cs	95.94% <100.00%> (+0.11%)	⬆️
...ckExchangeRedis/TracerProviderBuilderExtensions.cs	88.88% <100.00%> (ø)

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[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Adds OpenTelemetry schema URL (and instrumentation scope version) support to StackExchangeRedis traces by switching to an ActivitySourceFactory-created ActivitySource and updating tests/changelog accordingly.

Changes:

• Create ActivitySource instances with schema URL support via shared ActivitySourceFactory.
• Select between “old” and “new” semantic conventions by emitting activities from different ActivitySources.
• Add/extend tests to assert ActivitySource name/version and schema URL; update changelog.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
test/OpenTelemetry.Instrumentation.StackExchangeRedis.Tests/StackExchangeRedisCallsInstrumentationTests.cs	Adds assertions for scope name/version and schema URLs for emitted activities.
src/OpenTelemetry.Instrumentation.StackExchangeRedis/TracerProviderBuilderExtensions.cs	Registers the ActivitySource name from the created ActivitySource instance.
src/OpenTelemetry.Instrumentation.StackExchangeRedis/StackExchangeRedisConnectionInstrumentation.cs	Introduces schema-versioned ActivitySource instances via ActivitySourceFactory.
src/OpenTelemetry.Instrumentation.StackExchangeRedis/OpenTelemetry.Instrumentation.StackExchangeRedis.csproj	Links shared ActivitySourceFactory.cs into the project.
src/OpenTelemetry.Instrumentation.StackExchangeRedis/Implementation/RedisProfilerEntryToActivityConverter.cs	Chooses the appropriate ActivitySource based on EmitNewAttributes.
src/OpenTelemetry.Instrumentation.StackExchangeRedis/CHANGELOG.md	Documents the addition of scope version and schema URL to traces.

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