chore: Handle invalid email address in IMAP channel

[sojan-official]

We have observed in Sentry that sometimes fetch_imap_emails_jobs fails with a validation error when creating a contact. This happens when the original_sender isn't in a format supported by the Chatwoot contact model schema. Chatwoot validates contacts email with Device.email_regexp.

This PR will skip processing such emails. It also adds a log for each email processed in the email fetch job and an error for the ones we skip.

Fixes: https://linear.app/chatwoot/issue/CW-3295/activerecordrecordinvalid-validation-failed-email-invalid-email

[linear]

CW-3295 ActiveRecord::RecordInvalid: Validation failed: Email Invalid email (ActiveRecord::RecordInvalid)

[sentry-io]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ ActionController::UrlGenerationError: No route matches {:action=>"show", :controller=>"active_storage/blobs/redirect", :filename=>#<Act... Sidekiq/Inboxes::FetchImapEmailsJob View Issue

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