fix: remove dead automated user filtering code

The _is_automated_user method was never called - loop prevention is
handled by debouncing instead. User email filtering was intentionally
removed because the notification email is the page CREATOR, not editor.

- Remove unused _is_automated_user method
- Update test to verify notifications are processed regardless of user
- Remove obsolete test_automated_user_filtering test

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tests/test_wiki_change_listener.py

@@ -50,22 +50,6 @@ class TestWikiChangeListener:
         assert listener._debounce_seconds == 5
         assert len(listener._recent_notifications) == 0
 
-    @pytest.mark.asyncio
-    async def test_automated_user_filtering(self, listener):
-        """Test that automated users are correctly identified."""
-        # Automated users should be filtered
-        assert listener._is_automated_user("librarian@schweitz.net") is True
-        assert listener._is_automated_user("library-desk@system") is True
-        assert listener._is_automated_user("automation@system") is True
-        assert listener._is_automated_user("bot@system") is True
-
-        # Case insensitive
-        assert listener._is_automated_user("LIBRARIAN@SCHWEITZ.NET") is True
-
-        # Regular users should not be filtered
-        assert listener._is_automated_user("user@example.com") is False
-        assert listener._is_automated_user("john@example.com") is False
-
     @pytest.mark.asyncio
     async def test_debouncing_prevents_duplicates(self, listener):
         """Test that debouncing prevents duplicate processing."""
@@ -163,19 +147,29 @@ class TestWikiChangeListener:
             assert mock_process.call_args[1]['event'] == 'page.delete'
 
     @pytest.mark.asyncio
-    async def test_automated_user_notification_filtered(self, listener):
-        """Test that notifications from automated users are filtered out."""
+    async def test_any_user_notification_processed(self, listener):
+        """Test that notifications are processed regardless of user email.
+
+        Note: The user_email in PostgreSQL notifications is the page CREATOR,
+        not the editor. We cannot filter by user email because:
+        - A page created by 'librarian' but edited by a human should be processed
+        - Filtering by creator would break legitimate page ingestion
+        Loop prevention is handled by debouncing instead.
+        """
         mock_connection = AsyncMock()
 
         with patch.object(listener, '_process_page_change', new_callable=AsyncMock) as mock_process:
-            # Notification from automated user should be skipped
+            # Even system user notifications should be processed
+            # (debouncing handles loop prevention, not user filtering)
             await listener._handle_notification(
                 mock_connection, 1234, 'wiki_page_changes',
                 'UPDATE:123:librarian@schweitz.net'
             )
 
-            # Process should NOT be called
-            mock_process.assert_not_called()
+            # Process SHOULD be called (user filtering is not used)
+            mock_process.assert_called_once()
+            assert mock_process.call_args[1]['page_id'] == 123
+            assert mock_process.call_args[1]['event'] == 'page.update'
 
     @pytest.mark.asyncio
     async def test_duplicate_notification_filtered(self, listener):