refactor(core): improve typing and test coverage

Restructure database and user CLI commands, make passwords write-only
model properties, and use the UTC datetime constant throughout the
application.

Add PEP 287-style documentation and expand receiver, scanner, sender,
and URL security tests to cover error paths and edge cases.

1 files changed, 3 insertions, 3 deletions

diff --git a/tests/test_views.py b/tests/test_views.py
index aac281e..67ed190 100644
--- a/tests/test_views.py
+++ b/tests/test_views.py
@@ -1,5 +1,5 @@
 import uuid
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 from unittest.mock import Mock, call, patch
 
 import pytest
@@ -19,7 +19,7 @@ from webmentions_ssg.models import (
 
 def log_in(app: Flask, client: FlaskClient) -> None:
     with app.app_context():
-        user = User(username="admin")
+        user = User(username="admin", password="test")
 
         db.session.add(user)
         db.session.commit()
@@ -32,7 +32,7 @@ def log_in(app: Flask, client: FlaskClient) -> None:
 
 
 def create_sent_source(app: Flask) -> uuid.UUID:
-    now = datetime.now(timezone.utc)
+    now = datetime.now(UTC)
 
     with app.app_context():
         source = Source(