refactor: add otel tracing filter to logging

[AngeloDanducci]

Misc PR

Will need to update after #457 is merged to use MelleaLogger

Type of PR

• Bug Fix
• New Feature
• Documentation
• Other

Description

• Link to Issue: Fixes Create a custom logging.Filter that automatically extracts the current OpenTelemetry trace context and injects trace_id and span_id into every log record #458

Testing

• Tests added to the respective file if code was changed
• New code has 100% coverage if code as added
• Ensure existing tests and github automation passes (a maintainer will kick off the github automation when the rest of the PR is populated)

[github-actions]

The PR description has been updated. Please fill out the template for your PR to be reviewed.

[ajbozarth]

Edit: I tried letting Claude review and post this time while I was working on a different task

Review: OTel Trace Context Injection

Clean, well-motivated addition. The no-op guard when OTel isn't installed is correct, the test coverage is thorough, and the _otel_span context manager is a solid test helper. A few issues worth addressing before merging.

Bugs:

1. Unsafe span_id access in JsonFormatter._build_log_dict — crashes if span_id is absent when trace_id is present
2. trace_id / span_id not added to RESERVED_LOG_RECORD_ATTRS — silent overwrite risk from set_log_context

Design / Clarity:
3. Integration tests mutate the MelleaLogger singleton without resetting it first — order-dependent flakiness risk

Nits:

• Blank line removal before # Apply include/exclude filtering is an unrelated cosmetic change
• Docstring update on private _build_log_dict is redundant; the public format() already got the note

[jakelorocco]

A few questions but lgtm without more changes. Thank you

[AngeloDanducci]

I believe these are already addressed @ajbozarth

1. conditional span_id ref https://github.com/generative-computing/mellea/blob/main/mellea/core/utils.py#L368
2. reserved log record attrs - https://github.com/generative-computing/mellea/blob/main/mellea/core/utils.py#L70, https://github.com/generative-computing/mellea/blob/main/mellea/core/utils.py#L74
3. Setup and teardown here https://github.com/generative-computing/mellea/blob/main/test/core/test_utils_logging.py#L706

[ajbozarth]

I believe these are already addressed @ajbozarth

Yeah I deleted my comment, I didn't noticed that since the branch had been deleted already that I hadn't actually pulled latest code for Claude to look at