xous-core: PDDB key changed notification not working as expected

Kind of…it’s an offline fsck if anything. The main thing is it’s not capable of editing the record to fix problems – you can diagnose them, and it’s flexible enough that in the worst case we could do something horrible like brute-force every block to search for old journal entries given a set of keys, but as of now it can’t do the key thing that fsck does (in my mind) which is resolve filesystem structures that are corrupted by an ungraceful powerdown. Right now it just triggers a panic and I’m patching over issue piecemeal as they happen.

ok found this: https://betrusted.io/xous-book/ch09-00-pddb-overview.html