Reduce cache TTL from 1 hour to 15 minutes for faster data refresh

setup_data.py

@@ -25,8 +25,8 @@ _last_fetch_time = None
 _fetch_lock = threading.Lock()
 _refresh_callbacks = []  # Callbacks to call after data refresh
 
-# Cache TTL can be configured via environment variable (default: 1 hour = 3600 seconds)
-CACHE_TTL_SECONDS = int(os.environ.get("CACHE_TTL_SECONDS", 3600))
+# Cache TTL can be configured via environment variable (default: 15 minutes = 900 seconds)
+CACHE_TTL_SECONDS = int(os.environ.get("CACHE_TTL_SECONDS", 900))
 
 
 def get_repo_clone_dir() -> Path: