Execute a QA query with full tracing enabled.

Authentication Required: This endpoint requires a valid JWT token.

Debug Mode Required: Set ENABLE_DEBUG_ENDPOINTS=true in environment.

Returns the answer plus detailed trace data including:

• All service method calls with timing
• Knowledge base sources retrieved with scores
• LLM metrics (tokens, model, latency)
• Total request duration

Example response:

{
    "answer": "With Sun in your 10th house...",
    "trace": {
        "trace_id": "abc12345",
        "query": "What does Sun in 10th house mean?",
        "total_duration_ms": 1850,
        "services_called": [...],
        "kb_sources_used": [...],
        "llm_metrics": {...}
    }
}