feat: harden gateway with policy engine, secure tools, and governance docs

scripts/rotate_api_key.py

@@ -106,11 +106,7 @@ def main() -> None:
     print()
 
     # Update .env file
-    new_env_content = re.sub(
-        r"MCP_API_KEYS=([^\n]+)",
-        f"MCP_API_KEYS={new_keys_str}",
-        env_content
-    )
+    new_env_content = re.sub(r"MCP_API_KEYS=([^\n]+)", f"MCP_API_KEYS={new_keys_str}", env_content)
 
     # Backup old .env
     backup_file = env_file.with_suffix(f".env.backup-{datetime.now().strftime('%Y%m%d-%H%M%S')}")
@@ -170,5 +166,6 @@ if __name__ == "__main__":
     except Exception as e:
         print(f"\n❌ Error: {e}", file=sys.stderr)
         import traceback
+
         traceback.print_exc()
         sys.exit(1)