Fix AgentOps HTTP response error handling for 503 Service Unavailable errors

[Copilot]

The AgentOps instrumentation was causing agent crashes when LLM servers returned HTTP 503 (Service Unavailable) errors. This resulted in agents returning answer: None instead of computing actual results.

Problem

When using local LLM servers (like vLLM) that occasionally return 503 errors due to overload or temporary unavailability, the AgentOps instrumentation would crash while attempting to parse the HTTP response:

🖇 AgentOps: [OPENAI WRAPPER] Error in async_chat_completion_stream_wrapper: Error code: 503
Failure: Error code: 503
answer: None ground_truth: 8 reward: 0.0

The root cause was in agentlightning/instrumentation/agentops.py where the code called http_response.json() without proper error handling in both _patch_new_agentops() and _patch_old_agentops() functions.

Solution

Added try-catch blocks around JSON parsing operations to handle HTTP error responses gracefully:

# Before (would crash on 503 errors):
json_data = return_value.http_response.json()
if isinstance(json_data, dict):
    # ... process token data ...

# After (handles errors gracefully):
try:
    json_data = return_value.http_response.json()
    if isinstance(json_data, dict):
        # ... process token data ...
except Exception as e:
    logger.debug(f"Failed to parse HTTP response JSON for token extraction: {e}")

Impact

• Agents continue running normally even when LLM servers return 503 errors
• Token extraction failures are logged as debug messages without interrupting execution
• Successful responses continue to work exactly as before
• Minimal change approach with only 18 lines modified (6 added, 12 changed)

This fix specifically resolves the issue in the examples/calc_x directory where agents were failing to compute mathematical answers due to instrumentation crashes.

Fixes #56.

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