migrated to tanasty and added dead letter queue

python/orm/richie/dead_letter_message.py

@@ -0,0 +1,26 @@
+"""Dead letter queue for Signal bot messages that fail processing."""
+
+from __future__ import annotations
+
+from datetime import datetime
+
+from sqlalchemy import DateTime, Text
+from sqlalchemy.dialects.postgresql import ENUM
+from sqlalchemy.orm import Mapped, mapped_column
+
+from python.orm.richie.base import TableBase
+from python.signal_bot.models import MessageStatus
+
+
+class DeadLetterMessage(TableBase):
+    """A Signal message that failed processing and was sent to the dead letter queue."""
+
+    __tablename__ = "dead_letter_message"
+
+    source: Mapped[str]
+    message: Mapped[str] = mapped_column(Text)
+    received_at: Mapped[datetime] = mapped_column(DateTime(timezone=True))
+    status: Mapped[MessageStatus] = mapped_column(
+        ENUM(MessageStatus, name="message_status", create_type=True, schema="main"),
+        default=MessageStatus.UNPROCESSED,
+    )