feat(crewai): Enable Tracing Support For CrewAI Metrics

[ialisaleh]

This PR adds tracing support for CrewAI to capture & expose metrics associated with short & long-term memory operations.

Memory Events

Memory Attributes

The following screenshots are outdated.

LongTermMemorySave

LongTermMemorySearch

ShortTermMemorySave

ShortTermMemorySearch

Closes #2207

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Note

Adds tracing for CrewAI short/long-term memory save/search with event attributes and timings, and updates the example to enable SQLite-backed long-term memory.

• Instrumentation (crewai):
  • Memory events: Add wrappers for LongTermMemory.save/search and ShortTermMemory.save/search that log structured span events with flattened attributes and timing metrics.
  • Event utility: Introduce _log_span_event to add events and prefixed attributes to the active span.
  • Registration: Wire wrappers in CrewAIInstrumentor _instrument and cleanly restore in _uninstrument.
  • Attribute handling: Enhance _flatten to join List[str] values.
• Example:
  • Enable Crew memory in examples/research_writer_crew.py with LongTermMemory using LTMSQLiteStorage at crewai_storage/memory.db; add project-local storage path setup.

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