chore: import upstream snapshot with attribution

servers/fastapi/models/sql/webhook_subscription.py

@@ -0,0 +1,22 @@
+import secrets
+from typing import Optional
+import uuid
+from datetime import datetime
+from sqlmodel import Column, DateTime, Field, SQLModel
+
+from utils.datetime_utils import get_current_utc_datetime
+
+
+class WebhookSubscription(SQLModel, table=True):
+    __tablename__ = "webhook_subscriptions"
+
+    id: str = Field(
+        default_factory=lambda: f"webhook-{secrets.token_hex(32)}", primary_key=True
+    )
+    created_at: datetime = Field(
+        sa_column=Column(DateTime(timezone=True), nullable=False),
+        default_factory=get_current_utc_datetime,
+    )
+    url: str
+    secret: Optional[str] = None
+    event: str = Field(index=True)