bug: a failed disconnect drops the forced invoice refresh kept through a failed restore #999

Refs:

• fix: pause paykit work during profile deletion #954
• review thread

What happened?

When a restore fails and a channel becomes usable meanwhile, #954 keeps a forced Lightning refresh for the public invoice. If the user then taps Disconnect and it fails (it needs the homeserver to remove the private endpoints), signOut(performSessionCleanup:) has already bumped sessionRevision in beginSessionMutation() and keeps it. After Try Again restores the same identity, preparePendingPublicPaykitInvoiceRefresh drops the kept refresh ("kept refresh dropped: identity changed"), and the publication reuses a cached invoice whose route hints can predate the new channel.

Expected behavior

A failed Disconnect that leaves the same identity keeps the pending forced refresh, so the next publication refreshes route hints for the new channel.