Don't create event tables unless TRULENS_OTEL_TRACING env variable is set.

[sfc-gh-dkurokawa]

Description

Don't create event tables unless TRULENS_OTEL_TRACING env variable is set.

Currently things are broken for dialects that don't handle JSON which include Snowflake and possibly other stuff.

Other details good to know for developers

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to
  not work as expected)
• New Tests
• This change includes re-generated golden test results
• This change requires a documentation update

---

Important

Event tables are conditionally created based on TRULENS_OTEL_TRACING environment variable to fix JSON dialect issues.

• Behavior:
  • Event tables are only created if TRULENS_OTEL_TRACING environment variable is set to "1" or "true" in 10_create_event_table.py.
  • Fixes issues with database dialects that do not support JSON, such as Snowflake.
• Testing:
  • Sets TRULENS_OTEL_TRACING to "1" in setUpClass of TestOtelInstrument in test_otel_instrument.py.
• Utilities:
  • Adds check for model_fields having items attribute in get_class_members in utils.py to handle Pydantic models.

^{This description was created by for d420a17. It will automatically update as commits are pushed.}