Verify-parity opens the DB with PRAGMA journal_mode=WAL, which contends
with the running Zotero container's lock and fails the test with
"database is locked". Snapshot via shutil.copy2 first — schema rows
(itemTypes/fields/creatorTypes) are stable so a hot copy is fine for
this test's purpose.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>