Fix #4474: Widen OpenTelemetry version constraints to resolve dependency conflicts

[devin-ai-integration]

Fix #4474: Widen OpenTelemetry version constraints to >=1.34.0,<2

Summary

The opentelemetry-api, opentelemetry-sdk, and opentelemetry-exporter-otlp-proto-http dependencies were pinned to ~=1.34.0 (i.e. >=1.34.0, <1.35.0). This prevented coinstallation with libraries like google-adk which require opentelemetry-api>=1.36.0.

This PR widens the constraints to >=1.34.0,<2, matching the pattern used by other crewAI dependencies (e.g. openai>=1.83.0,<3). The OpenTelemetry APIs used by crewAI (trace, baggage, context, SDK resources, TracerProvider, BatchSpanProcessor, OTLPSpanExporter) are stable public APIs within the 1.x line.

A new test file test_opentelemetry_compatibility.py is added with 6 tests covering import functionality, version floor checks, and Telemetry singleton initialization.

Review & Testing Checklist for Human

• Verify the upper bound <2 is acceptable — the previous pin ~=1.34.0 was very conservative. Consider whether a tighter bound like <1.40 would be more appropriate to reduce risk of future breakage from an unknown OTel 1.x release.
• Note that the tests don't validate forward compatibility — the added tests verify the currently-resolved OTel version works, but don't actually install or test with 1.36+/1.38+ versions. The resolver may still pick 1.34.x. To truly validate, manually test with pip install opentelemetry-api==1.38.0 opentelemetry-sdk==1.38.0 opentelemetry-exporter-otlp-proto-http==1.38.0 and run the telemetry test suite.
• Confirm uv.lock diff is clean — only the three specifier lines should change in uv.lock; no unintended version bumps of resolved packages.

Notes

• Link to Devin run: https://app.devin.ai/sessions/7cc44aad02cb476f90191ad29043a9de
• Requested by: João

[devin-ai-integration]

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