chore: remove cache/ directory

.gitignore

@@ -45,3 +45,6 @@ logs/
 # Sphinx
 docs/_build/
 docs/ref/modules/
+
+# known clients
+config/known_clients.yaml

src/judas_server/backend/backend_server.py

@@ -49,9 +49,9 @@ class BackendServer:
         )
 
         self.clients: dict[str, Client] = {}
-        self.known_clients: dict[str, dict[str, str | float]] = (
+
-            self._load_known_clients()
+        self.known_clients: dict[str, dict[str, str | float]] = {}
-        )
+        self.known_clients = self._load_known_clients()
 
         self.message_handlers: dict[
             tuple[Category, ActionType], Callable[[Client, Message], None]
@@ -114,8 +114,7 @@ class BackendServer:
             self.logger.warning(
                 "known_clients.yaml not found, creating empty known clients list"
             )
-            with open("config/known_clients.yaml", "w") as f:
+            self._save_known_clients()
-                yaml.safe_dump({"known_clients": {}}, f)
         except Exception as e:
             self.logger.error(f"Error loading known clients: {e}")
             raise
@@ -125,6 +124,11 @@ class BackendServer:
     def _save_known_clients(self) -> None:
         """Save the list of known clients to a YAML file."""
         with open("config/known_clients.yaml", "w") as f:
+            f.write(
+                "# This file is automatically generated by BackendServer.\n"
+                + "# Do not edit manually.\n"
+                + f"# Generated at: {time.strftime('%Y-%m-%d %H:%M:%S', time.localtime())}\n\n"
+            )
             yaml.safe_dump({"known_clients": self.known_clients}, f)
         self.logger.debug("Saved known clients")