Ensure nRF Connect platform storage backend succeeds Storage audit

[Damian-Nordic]

Problem

PR #20134 and #20164 together introduced a storage API compliance audit.

This audit must be run and pass on nRF Connect and succeed against PersistentStorageDelegate used by lock-app (KVS file based)

To run the audit for anything using Server, build your target with chip_support_enable_storage_api_audit=true added to your GN args and then run your binary in a debugger. The default audit is added to Server::Init() and will cause an assert with logs on failure.

Audit passes once you see the following string in your logs

• ==== PersistentStorageDelegate API audit: SUCCESS ====

On failure, informative assertion failures are logged to assist in debugging.

Proposed Solution

• Build with audit enabled
• Run and comment on passing along with the SHA of the commit where it was run. Provide a logs capture of your run.
• If you find failures, please document them in comments on the issue to help SDK team audit the types of failures/assumptions made.
• Close the issue once you pass