fix: deduplicate repeated LXC digest results

AppImage/scripts/notification_manager.py

@@ -1636,20 +1636,33 @@ class NotificationManager:
             conn = sqlite3.connect(str(DB_PATH), timeout=10)
             conn.execute('PRAGMA journal_mode=WAL')
             conn.execute('PRAGMA busy_timeout=5000')
-            # Adjacent collectors can observe the same completed task. Only
-            # coalesce byte-for-byte identical rows, so a different version,
-            # source or result stays visible in the same digest.
+            # Adjacent collectors can observe one completed LXC update with
+            # different transport details (for example source or duration).
+            # The rendered title already identifies its LXC and result, so
+            # coalesce that narrowly. Other event types retain the stricter
+            # title-and-body comparison so distinct updates stay visible.
             now = int(time.time())
-            duplicate = conn.execute(
-                'SELECT 1 FROM digest_pending '
-                'WHERE channel = ? AND event_type = ? AND event_group = ? '
-                'AND severity = ? AND title = ? AND body = ? AND ts >= ? '
-                'LIMIT 1',
-                (
-                    ch_name, event_type, event_group, severity, title, body,
-                    now - self._DIGEST_DUPLICATE_WINDOW,
-                ),
-            ).fetchone()
+            if event_type == 'lxc_update_applied':
+                duplicate = conn.execute(
+                    'SELECT 1 FROM digest_pending '
+                    'WHERE channel = ? AND event_type = ? AND event_group = ? '
+                    'AND severity = ? AND title = ? AND ts >= ? LIMIT 1',
+                    (
+                        ch_name, event_type, event_group, severity, title,
+                        now - self._DIGEST_DUPLICATE_WINDOW,
+                    ),
+                ).fetchone()
+            else:
+                duplicate = conn.execute(
+                    'SELECT 1 FROM digest_pending '
+                    'WHERE channel = ? AND event_type = ? AND event_group = ? '
+                    'AND severity = ? AND title = ? AND body = ? AND ts >= ? '
+                    'LIMIT 1',
+                    (
+                        ch_name, event_type, event_group, severity, title, body,
+                        now - self._DIGEST_DUPLICATE_WINDOW,
+                    ),
+                ).fetchone()
             if duplicate:
                 conn.close()
                 return