feat: complete production-quality Model Router AI traffic control platform

backend/app/observability/events.py

@@ -0,0 +1,43 @@
+import json
+import logging
+from typing import Dict, Any, Optional
+import datetime
+
+logger = logging.getLogger("model_router.observability")
+logger.setLevel(logging.INFO)
+if not logger.handlers:
+    handler = logging.StreamHandler()
+    formatter = logging.Formatter('{"time":"%(asctime)s", "level":"%(levelname)s", "event":%(message)s}')
+    handler.setFormatter(formatter)
+    logger.addHandler(handler)
+
+
+def log_router_event(
+    event_name: str,
+    request_id: str,
+    model: Optional[str] = None,
+    provider: Optional[str] = None,
+    duration_ms: Optional[float] = None,
+    metadata: Optional[Dict[str, Any]] = None,
+):
+    """
+    Structured event logger for model router pipeline.
+    Redacts sensitive credentials automatically.
+    """
+    payload = {
+        "event": event_name,
+        "request_id": request_id,
+        "timestamp": datetime.datetime.utcnow().isoformat(),
+        "model": model,
+        "provider": provider,
+        "duration_ms": duration_ms,
+    }
+    if metadata:
+        # Sanitize any key that looks like an API token
+        safe_meta = {
+            k: ("[REDACTED]" if "key" in k.lower() or "secret" in k.lower() or "token" in k.lower() and "count" not in k.lower() else v)
+            for k, v in metadata.items()
+        }
+        payload["metadata"] = safe_meta
+
+    logger.info(json.dumps(payload))