feat(web_server.py): add BackendServer reference to webserver

src/judas_server/web/web_server.py

@@ -3,19 +3,26 @@
 from __future__ import annotations
 
 import logging as lg
+from typing import TYPE_CHECKING
+
 from flask import Flask
 from flask_login import LoginManager
 
 from judas_server.web.user import load_user
 
+if TYPE_CHECKING:
+    from judas_server.backend import BackendServer
+
 
 class JudasWebServer:
-    def __init__(self, secret_key: str) -> None:
+    def __init__(self, backend: BackendServer, secret_key: str) -> None:
         self.logger: lg.Logger = lg.getLogger(
             f"{__name__}.{self.__class__.__name__}"
         )
         self.logger.debug("Initializing JudasWebServer...")
 
+        self.backend: BackendServer = backend
+
         self.app: Flask = Flask(
             __name__, static_folder="static", template_folder="templates"
         )