Manav Rathi 3188643583
[server] Report a client error instead of 5xx on invalid pk signature
e.g.

    --- at /etc/ente/pkg/api/user.go:352 (UserHandler.FinishPasskeyAuthenticationCeremony) ---
    --- at /etc/ente/pkg/repo/passkey/passkey.go:395 (Repository.FinishAuthentication) ---
    Caused by: Error validating the assertion signature: \u003cnil\u003e
2025-01-24 05:35:01 +05:30
..
2024-03-01 13:37:01 +05:30
2024-03-01 13:37:01 +05:30