feat: add board webhook configuration and payload models

backend/app/models/board_webhooks.py

@@ -0,0 +1,26 @@
+"""Board webhook configuration model."""
+
+from __future__ import annotations
+
+from datetime import datetime
+from uuid import UUID, uuid4
+
+from sqlmodel import Field
+
+from app.core.time import utcnow
+from app.models.base import QueryModel
+
+RUNTIME_ANNOTATION_TYPES = (datetime,)
+
+
+class BoardWebhook(QueryModel, table=True):
+    """Inbound webhook endpoint configuration for a board."""
+
+    __tablename__ = "board_webhooks"  # pyright: ignore[reportAssignmentType]
+
+    id: UUID = Field(default_factory=uuid4, primary_key=True)
+    board_id: UUID = Field(foreign_key="boards.id", index=True)
+    description: str
+    enabled: bool = Field(default=True, index=True)
+    created_at: datetime = Field(default_factory=utcnow)
+    updated_at: datetime = Field(default_factory=utcnow)