A scan that finds no recipe files at all is not a reliable deletion
signal: an unmounted drive, a recipes_path that silently falls back to
another LoRA root, or a cache shared with a second instance all look
exactly like a real wipe. The reconcile step treated them all as
deletions and overwrote the persistent cache with an empty one, so
DELETE FROM recipes destroyed the user's only record of their recipes
and the FTS index was rebuilt from the empty view (#1116).
Guard the prune:
- _reconcile_recipe_cache reports an all-missing result when every
persisted recipe file is gone AND the stored rows match the recorded
file stats. An internally inconsistent cache (leftover orphans) is
stale, not evidence of a fresh disappearance, and still prunes.
- The caller keeps the stored cache and logs a warning naming the
directory it scanned and the number of recipes it preserved, instead
of writing the empty result. It also skips the FTS rebuild so the
index stays aligned with the stored rows.
- save_cache gains skip_if_empty as a storage-level backstop: refuse to
empty a populated cache. Intentional clears (manual rebuild) keep the
default behaviour.
- Log the resolved scan directory per run so a support reader can tell a
real wipe apart from a scan that looked elsewhere.
Partial orphans (ordinary manual deletions) keep pruning as before.
Will Miao