refactor(auth): remove legacy RESTful user routes and migrate authentication to GraphQL context

- Rename get_current_user to get_current_user_id in auth/deps.py to clarify intent
- Remove legacy /me, /logout routes, and placeholder function from auth/__init__.py
- Remove dependency_overrides from app/main.py
- Update CustomContext to resolve and cache full User objects via db query

.cliprepo.yaml

@@ -6,21 +6,27 @@ prompts:
 
 preset:
   auth:
-    - "app/auth.py"
-    - "app/auth/*"
+    - "auth/*"
 
   s3:
     - "app/models/base.py"
     - "app/models/user.py"
     - "app/utils/s3.py"
-    - "app/auth.py"
+    - "auth.py"
 
   db_model:
     - "app/models/*"
     - "app/db.py"
-    # - "app/auth.py"
     - "app/main.py"
 
   graphql:
     - "app/graphql/*"
-    - "app/main.py"
+    - "app/main.py"
+
+  get_current_user:
+    - "app/main.py"
+    - "auth/__init__.py"
+    - "auth/deps.py"
+    - "auth/tokens.py"
+    - "auth/oauth/google.py"
+    - "app/graphql/*"