Method checkpointWalTruncate

src/db/index.ts:538–540

* `PRAGMA wal_checkpoint(TRUNCATE)` — same off-thread pattern as PASSIVE, * but on success the WAL FILE is chopped to zero. A completed passive * backfill bounds the un-checkpointed backlog, yet the FILE only stops * growing when a commit finds ZERO readers holding WAL marks — rare while

()

   * degrades this to a no-op (busy=1) instead of a stall.
   */
  async checkpointWalTruncate(): Promise<{ busy: number; log: number; checkpointed: number } | null> {
    return this.checkpointWal('TRUNCATE');
  }

  /**
   * Shrink a leftover oversized WAL (#1431). A SIGKILL'd session — the #850