Migration 000002 creates the pg_trgm extension only inside the conditional
embeddings block guarded by app.skip_embedding. Deployments that use a
non-postgres retrieve driver (Qdrant, Elasticsearch, Milvus, etc.) skip
that block entirely, so pg_trgm is never installed. When migration 000041
then runs CREATE INDEX ... USING GIN (lower(title) gin_trgm_ops) the
statement fails and the whole migration is rolled back, leaving
task_pending_ops and task_dead_letters uncreated. The application keeps
starting (migrations are best-effort), but wiki ingest enqueue silently
fails and wiki pages are never produced.
Re-issue CREATE EXTENSION IF NOT EXISTS pg_trgm at the top of 000041 so
the extension is guaranteed present at the moment the trigram index is
created. The statement is idempotent on environments where 000002 already
installed it, and surfaces a clear, early error on environments where the
extension genuinely cannot be loaded.
Fixes#1319.
Co-authored-by: Cursor <cursoragent@cursor.com>
wizardchen
3a0a0cff9c