fix: drop/re-add ammo_for_id FK in seed/load.sh

The equipment table has a circular FK (ammo_for_id → equipment.id)
which causes insert failures when loading a pg_dump with --inserts.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: graylikeme

seed/load.sh

@@ -32,6 +32,9 @@ else
   exit 1
 fi
 
+echo "==> Dropping circular FK (equipment.ammo_for_id)..."
+psql "$DB_URL" -q -c "ALTER TABLE equipment DROP CONSTRAINT IF EXISTS equipment_ammo_for_id_fkey;"
+
 echo "==> Truncating tables..."
 psql "$DB_URL" -q -c "
   TRUNCATE
@@ -71,6 +74,9 @@ psql "$DB_URL" -q -c "
 echo "==> Loading seed data..."
 gunzip -c "$DUMP_FILE" | psql "$DB_URL" -q -o /dev/null
 
+echo "==> Re-adding circular FK..."
+psql "$DB_URL" -q -c "ALTER TABLE equipment ADD CONSTRAINT equipment_ammo_for_id_fkey FOREIGN KEY (ammo_for_id) REFERENCES equipment(id) ON DELETE SET NULL;"
+
 echo "==> Resetting sequences..."
 psql "$DB_URL" -q -o /dev/null -c "
   SELECT setval('dataset_metadata_id_seq', COALESCE((SELECT MAX(id) FROM dataset_metadata), 0) + 1, false);