Joshua King c3e7c0d3d6 fix: immutable=1 probe URI (no sidecar creation guaranteed), fs work inside executor job, WAL-header corruption test case ...

- probe URI adds immutable=1: SQLite's documented guarantee that the
  read-only connection performs no writes and creates no -wal/-shm
  sidecars, even against a WAL-header database
- exists/stat/resolve and URI construction moved inside the executor
  job with the probe (no event-loop disk I/O)
- new WAL-header corruption test asserts byte-identical file and no
  -shm creation from the probe

2026-09-14 08:45:48 -04:00

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nestquest

fix: immutable=1 probe URI (no sidecar creation guaranteed), fs work inside executor job, WAL-header corruption test case

2026-09-14 08:45:48 -04:00