Fix/pylint cleanup (#8)

* Fix pylint warnings across all 24 Python files in web_server

- Add module, class, and function docstrings (C0114, C0115, C0116)
- Fix import ordering: stdlib before third-party before local (C0411)
- Replace wildcard imports with explicit named imports (W0401)
- Remove trailing whitespace and add missing final newlines (C0303, C0304)
- Replace dict() with dict literals (R1735)
- Remove unused imports and variables (W0611, W0612)
- Narrow broad Exception catches to specific exceptions (W0718)
- Replace f-string logging with lazy % formatting (W1203)
- Fix variable naming: UPPER_CASE for constants, snake_case for locals (C0103)
- Add pylint disable comments for necessary global statements (W0603)
- Fix no-else-return, simplifiable-if-expression, singleton-comparison
- Fix bad indentation in stripe.py (W0311)
- Add encoding="utf-8" to open() calls (W1514)
- Add check=True to subprocess.run() calls (W1510)
- Register Celery task modules via conf.include

* Update `package-lock.json` add peer dependencies

web_server/blueprints/admin.py

@@ -1,6 +1,8 @@
+"""Admin blueprint for user management operations."""
+
 from flask import Blueprint, session
 from utils.utils import sanitize
-from utils.admin_utils import *
+from utils.admin_utils import check_if_admin, check_if_user_exists, ban_user
 
 admin_bp = Blueprint("admin", __name__)
 
@@ -18,10 +20,10 @@ def admin_delete_user(banned_user):
     # Check if the user is an admin
     username = session.get("username")
     is_admin = check_if_admin(username)
-    
+
     # Check if the user exists
     user_exists = check_if_user_exists(banned_user)
 
     # If the user is an admin, try to delete the account
     if is_admin and user_exists:
-        ban_user(banned_user)
+        ban_user(banned_user)