Migrations 56 (chat_sessions.cliSessionFile) and 57 (ai_sessions.archived)
were added without bumping SCHEMA_VERSION, so migrate() early-returned on
existing v55 DBs. The dashboard surfaced this as repeated 500s on
/api/ai-sessions: "no such column: archived". Add a guardrail test that
parses db.ts and asserts SCHEMA_VERSION matches the highest applyMigration
target.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
cd848a04a8