After upgrading gbrain from 0.42.26.0 to 0.42.32.0, gbrain reindex-frontmatter consistently fails with: "GBrain: Timed out waiting for PGLite lock."

Steps to reproduce:

1. gbrain init --pglite --no-embedding
2. gbrain import <dir> --no-embed
3. gbrain config set search.mode conservative
4. gbrain reindex-frontmatter

Expected: frontmatter reindex completes.
Actual: always times out on PGLite lock.

Other write commands work fine (gbrain config set, gbrain list, gbrain extract links). Only reindex-frontmatter blocks.
Environment: PGLite, no embeddings, 76 pages, schema migrated successfully via upgrade.