Fix agentops unauthorized errors and deprecated call

[areibman]

📥 Pull Request

📘 Description Addresses AgentOps deprecation warnings by migrating from agentops.end_session() to the modern trace-based API (agentops.start_trace() and agentops.end_trace()). Also resolves 401 Unauthorized errors by improving API key validation and providing clear guidance for setup. A fixed example (fixed_crewai_example.py) and a comprehensive guide (AGENTOPS_FIX_GUIDE.md) are included.

🧪 Testing A test_fix.py script was created to validate:

• Correct module imports.
• Availability of modern AgentOps API functions.
• Syntax of the fixed example code.
• Absence of deprecated end_session() and presence of new trace management functions (start_trace, end_trace, auto_start_session=False).

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[github-actions[bot]]

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