feat(fc3b): migration 0011 — credential schema aligned with GS wire fields

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

alembic/versions/0011_fc3b_credential_schema_alignment.py

@@ -0,0 +1,41 @@
+"""fc3b: rename credential.kind -> credential_type, drop status, add last_verified
+
+Revision ID: 0011
+Revises: 0010
+Create Date: 2026-05-20
+
+Aligns the credential table with the GallerySubscriber wire-field names
+so the existing browser extension can POST to FC unmodified. Greenfield —
+no rows exist in production yet, so no data preservation logic is
+needed; the rename uses ALTER COLUMN rather than copy-then-drop.
+"""
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+revision: str = "0011"
+down_revision: Union[str, None] = "0010"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.alter_column("credential", "kind", new_column_name="credential_type")
+    op.drop_column("credential", "status")
+    op.add_column(
+        "credential",
+        sa.Column("last_verified", sa.DateTime(timezone=True), nullable=True),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("credential", "last_verified")
+    op.add_column(
+        "credential",
+        sa.Column(
+            "status", sa.String(length=32), nullable=False,
+            server_default="active",
+        ),
+    )
+    op.alter_column("credential", "credential_type", new_column_name="kind")