refactor(backend): update API routes and service layer

- Update agent router/service/repository with new endpoints
- Update auth routes with phone-based authentication
- Update users service with new phone lookup
- Update schedule_items with new schemas
- Update message schemas with visibility support
- Update settings with new automation scheduler config
- Update CLI with new commands
- Update tests to match new API contracts

backend/tests/e2e/test_profile_flow.py

@@ -11,21 +11,22 @@ import uvicorn
 
 from app import app
 from core.auth.models import CurrentUser
+from schemas.user.context import UserContext
 from v1.users.dependencies import get_current_user, get_user_service
-from v1.users.schemas import UserResponse, UserUpdateRequest
+from v1.users.schemas import UserUpdateRequest
 
 
 class FakeUserService:
     """Fake service for E2E testing."""
 
-    def __init__(self, user: UserResponse) -> None:
+    def __init__(self, user: UserContext) -> None:
         self._user = user
 
-    async def get_me(self) -> UserResponse:
+    async def get_me(self) -> UserContext:
         return self._user
 
-    async def update_me(self, update: UserUpdateRequest) -> UserResponse:
-        return UserResponse(
+    async def update_me(self, update: UserUpdateRequest) -> UserContext:
+        return UserContext(
             id=self._user.id,
             username=(
                 update.username if update.username is not None else self._user.username
@@ -38,6 +39,7 @@ class FakeUserService:
             bio=update.bio if update.bio is not None else self._user.bio,
         )
 
+
 def _find_free_port() -> int:
     with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
         sock.bind(("127.0.0.1", 0))
@@ -65,7 +67,7 @@ def _start_server(host: str, port: int):
 
 def test_profile_flow_e2e() -> None:
     user_id = UUID("00000000-0000-0000-0000-000000000001")
-    user = UserResponse(
+    user = UserContext(
         id=str(user_id),
         username="demo",
         avatar_url=None,