feat: enhance message handling with content pattern matching and update environment configuration

tests/test_maintenance.py

@@ -53,6 +53,44 @@ def test_should_delete_message():
     )
 
 
+def test_message_matches_pattern_content_and_embeds():
+    message = {
+        "content": "This is a smoke test payload",
+        "embeds": [
+            {"title": "Reminder", "description": "Half-time in 5 minutes"}
+        ],
+    }
+
+    assert maintenance.message_matches_pattern(message, r"smoke test")
+    assert maintenance.message_matches_pattern(message, r"half-time")
+    assert not maintenance.message_matches_pattern(message, r"does-not-match")
+
+
+def test_should_delete_message_with_content_pattern():
+    ts = int(datetime(2026, 1, 1, 10, 0, 0, tzinfo=timezone.utc).timestamp())
+    message = {
+        "timestamp": "2026-01-01T10:00:00Z",
+        "webhook_id": "w",
+        "author": {"id": "a"},
+        "embeds": [{"description": "This is a test notification."}],
+    }
+
+    assert maintenance.should_delete_message(
+        message,
+        webhook_id="w",
+        author_id="a",
+        cutoff=ts,
+        content_pattern=r"test notification",
+    )
+    assert not maintenance.should_delete_message(
+        message,
+        webhook_id="w",
+        author_id="a",
+        cutoff=ts,
+        content_pattern=r"production-only",
+    )
+
+
 def test_get_rate_limit_retry_after_header_priority():
     response = DummyResponse(
         headers={