fix: relax opentelemetry version pins to allow >=1.34.0,<2

[ManasVardhan]

Summary

Relaxes the OpenTelemetry dependency version pins from ~=1.34.0 (which resolves to >=1.34.0,<1.35.0) to >=1.34.0,<2.

Problem

The current tight pins on opentelemetry-api, opentelemetry-sdk, and opentelemetry-exporter-otlp-proto-http prevent users from installing newer OpenTelemetry versions (e.g., 1.38.x, 1.39.x) alongside crewAI. This causes dependency resolution failures when users need newer OTel versions for other packages like Langfuse.

Example error:

Because crewai==1.9.3 depends on opentelemetry-exporter-otlp-proto-http>=1.34.0,<1.35.dev0
and your project depends on opentelemetry-exporter-otlp-proto-http>=1.38,<2.dev0,
your project's requirements are unsatisfiable.

Changes

• opentelemetry-api: ~=1.34.0 → >=1.34.0,<2
• opentelemetry-sdk: ~=1.34.0 → >=1.34.0,<2
• opentelemetry-exporter-otlp-proto-http: ~=1.34.0 → >=1.34.0,<2

The OpenTelemetry libraries follow semantic versioning, so any 1.x release should be backward compatible. The <2 upper bound protects against breaking changes in a future 2.0 release.

Fixes #4511

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Note

Low Risk
Dependency constraint-only change with no runtime logic modifications; risk is limited to potential incompatibilities if newer OpenTelemetry 1.x introduces unexpected behavior.

Overview
Updates lib/crewai/pyproject.toml to relax the version constraints for opentelemetry-api, opentelemetry-sdk, and opentelemetry-exporter-otlp-proto-http from ~=1.34.0 to >=1.34.0,<2, improving compatibility with other packages that require newer OpenTelemetry 1.x versions.

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