[Observability] Add hiring.manager.id and gen_ai.agent.thought.process attributes

[threddy]

Sentinel mapper on the ingestion service is looking for these but we dont provide a way to set them on the SDK. Bridging the gap.

hiring.manager.id for all scope types via baggage builder / each of the DTOs.
gen_ai.agent.thought.process only for Inference scope.

[Copilot]

Pull request overview

Adds support in the Observability Runtime SDK for two attributes expected by the ingestion service—hiring.manager.id (all scope types) and gen_ai.agent.thought.process (Inference only)—including propagation paths and test coverage updates.

Changes:

• Introduces new OpenTelemetry attribute constants for hiring.manager.id and gen_ai.agent.thought.process.
• Enables setting/propagating hiring.manager.id via BaggageBuilder, ActivityProcessor, and DTO builders (InvokeAgent/ExecuteTool/ExecuteInference).
• Adds an Inference-only API (InferenceScope.RecordThoughtProcess) plus DTO support for emitting gen_ai.agent.thought.process, with corresponding tests.

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
src/Observability/Runtime/Tracing/Scopes/OpenTelemetryConstants.cs	Adds constants for hiring.manager.id and gen_ai.agent.thought.process.
src/Observability/Runtime/Common/BaggageBuilder.cs	Adds HiringManagerId(...) baggage setter.
src/Observability/Runtime/Tracing/Processors/ActivityProcessor.cs	Propagates hiring.manager.id from baggage to Activity tags.
src/Observability/Runtime/Tracing/Scopes/InferenceScope.cs	Adds RecordThoughtProcess(...) to set the thought-process Activity tag.
src/Observability/Runtime/DTOs/Builders/BaseDataBuilder.cs	Treats the new keys as reserved (prevents extraAttributes from overriding them).
src/Observability/Runtime/DTOs/Builders/InvokeAgentDataBuilder.cs	Adds optional hiringManagerId emission into InvokeAgent DTO attributes.
src/Observability/Runtime/DTOs/Builders/ExecuteToolDataBuilder.cs	Adds optional hiringManagerId emission into ExecuteTool DTO attributes.
src/Observability/Runtime/DTOs/Builders/ExecuteInferenceDataBuilder.cs	Adds optional thoughtProcess + hiringManagerId emission into ExecuteInference DTO attributes.
src/Tests/Microsoft.Agents.A365.Observability.Runtime.Tests/Middleware/BaggageBuilderTests.cs	Tests that HiringManagerId is set/restored in baggage.
src/Tests/Microsoft.Agents.A365.Observability.Runtime.Tests/Tracing/Scopes/InferenceScopeTest.cs	Tests RecordThoughtProcess sets the expected Activity tag.
src/Tests/Microsoft.Agents.A365.Observability.Runtime.Tests/DTOs/Builders/InvokeAgentDataBuilderTests.cs	Tests hiring.manager.id inclusion in InvokeAgent DTO attributes.
src/Tests/Microsoft.Agents.A365.Observability.Runtime.Tests/DTOs/Builders/ExecuteToolDataBuilderTests.cs	Tests hiring.manager.id inclusion in ExecuteTool DTO attributes.
src/Tests/Microsoft.Agents.A365.Observability.Runtime.Tests/DTOs/Builders/ExecuteInferenceDataBuilderTests.cs	Tests thought-process + hiring-manager inclusion in ExecuteInference DTO attributes.