chore: add ty + pre-commit hook and repeal even more ruff rules (#9504)

* auto fixes

* auto fix pt2 and transitive deps and undefined var checking locals()

* manual fixes (ignored or letta-code fixed)

* fix circular import

* remove all ignores, add FastAPI rules and Ruff rules

* add ty and precommit

* ruff stuff

* ty check fixes

* ty check fixes pt 2

* error on invalid

letta/server/rest_api/auth/index.py

@@ -22,7 +22,7 @@ class AuthRequest(BaseModel):
 
 
 def setup_auth_router(server: SyncServer, interface: QueuingInterface, password: str) -> APIRouter:
-    @router.post("/auth", tags=["auth"], response_model=AuthResponse)
+    @router.post("/auth", tags=["auth"])
     def authenticate_user(request: AuthRequest) -> AuthResponse:
         """
         Authenticates the user and sends response with User related data.