feat: add identity attributes to OTLP logs

[LucasAlvesSoares]

Description

Enriches OTel log records with sap.tenancy.tenant_id and user.id

A new IdentityLogFilter (in core/telemetry/log_filters/identity.py) is installed on the LoggingHandler created by setup_log_provider().

Type of Change

Please check the relevant option:

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Code refactoring
• Dependency update

How to Test

1. Run the new and updated test suites:

   pytest tests/core/unit/telemetry/log_filters/test_identity.py
   pytest tests/core/unit/telemetry/test_provider.py
   

2. In a Starlette/FastAPI app wired with auto_instrument() and StarletteIASTelemetryMiddleware, send a request with a valid IAS Bearer token and confirm that exported OTel log records carry sap.tenancy.tenant_id and user.id matching the JWT claims.
3. Confirm that log records emitted outside a request context (e.g. at startup) do not carry these attributes.

Checklist

Before submitting your PR, please review and check the following:

• I have read the Contributing Guidelines
• I have verified that my changes solve the issue
• I have added/updated automated tests to cover my changes
• All tests pass locally
• I have verified that my code follows the Code Guidelines
• I have updated documentation (if applicable)
• I have added type hints for all public APIs
• My code does not contain sensitive information (credentials, tokens, etc.)
• I have followed Conventional Commits for commit messages

Additional Notes

The filter is intentionally kept out of _provider.py and placed in log_filters/identity.py, mirroring the span_processors/ layout. Adding a new log filter in future requires only a new file in that folder and one import.

[jeanscherf]

LGTM.
Added one comment.

Also maybe it's worth updating the telemetry user-guide in the logging part. That we now inject these attribs as well.