debug: log raw body on /user/install to identify Evotor payload structure

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

web/routes/evotor_webhooks.py

@@ -281,6 +281,8 @@ async def user_install(request: Request, db: Session = Depends(get_db)):
     except Exception:
         return JSONResponse({"error": "Invalid JSON"}, status_code=400)
 
+    logger.info("user/install body=%s", body)
+
     evotor_user_id: str = body.get("userId", "")
     event_type: str = body.get("type", "").lower()  # "install" or "uninstall"