## Changes
- Removed complex retry logic in `ImapClientProvider` by delegating to
root orchestrator
- Added `parseImapAuthenticationError` for handling revoked
authentication credentials previously the code existed in
`parse-imap-error.util` but it didn't belong there and nor was not used
in `ImapClientProvider` causing revoked channels to be stuck in limbo
- Removed `parseImapError` from `*-error-handler.service.ts `
- Created `isImapNetworkError` for consistency with Gmail and Microsoft
- `isImapNetworkError` is called at utility level for consistency
