Clear legacy errors

migrations/versions/20260520_0002_remove_derived_dkim_dns_artifacts.py

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+"""remove derived dkim dns artifacts
+
+Revision ID: 20260520_0002
+Revises: 20260520_0001
+Create Date: 2026-05-20 00:00:00.000000+00:00
+"""
+from __future__ import annotations
+
+import json
+
+from alembic import op
+import sqlalchemy as sa
+
+revision = "20260520_0002"
+down_revision = "20260520_0001"
+branch_labels = None
+depends_on = None
+
+
+def _is_dkim_lookup_artifact(value: object) -> bool:
+    return isinstance(value, str) and (
+        value.startswith("DKIM lookup failed")
+        or value.startswith("DKIM record not found")
+    )
+
+
+def upgrade() -> None:
+    bind = op.get_bind()
+    snapshots = sa.table(
+        "domain_dns_snapshots",
+        sa.column("id", sa.Integer()),
+        sa.column("dkim_records_json", sa.Text()),
+        sa.column("errors_json", sa.Text()),
+    )
+    rows = bind.execute(sa.select(snapshots.c.id, snapshots.c.errors_json)).all()
+    for snapshot_id, errors_json in rows:
+        try:
+            errors = json.loads(errors_json or "[]")
+        except json.JSONDecodeError:
+            errors = []
+        if not isinstance(errors, list):
+            errors = []
+        cleaned_errors = [item for item in errors if not _is_dkim_lookup_artifact(item)]
+        bind.execute(
+            snapshots.update()
+            .where(snapshots.c.id == snapshot_id)
+            .values(
+                dkim_records_json="[]",
+                errors_json=json.dumps(cleaned_errors, sort_keys=True),
+            )
+        )
+
+
+def downgrade() -> None:
+    pass