refactor: split LDAP auth into backend/routers/auth.py

backend/main.py

@@ -6,7 +6,7 @@ from slowapi import Limiter
 from slowapi.util import get_remote_address
 from . import models
 from .database import engine
-from .routers import items, operations, users, categories
+from .routers import items, operations, users, auth, categories
 from .routers.admin import backups, config
 from .logger import log
 from .scheduler import scheduler, sync_scheduler_config
@@ -87,6 +87,7 @@ app.state.limiter = limiter
 app.include_router(items.router)
 app.include_router(operations.router)
 app.include_router(users.router)
+app.include_router(auth.router)
 app.include_router(categories.router)
 app.include_router(backups.router)
 app.include_router(config.router)