Clear completed deletes from Busy using exact message identity

[bcbetterninja]

An Outlook message already moved to Deleted Items could remain in Busy after its stored server ID stopped resolving. Recovery searched by subject with a 100-result limit, while older delete actions stored deleteditems as their destination and compared it directly with Microsoft's opaque folder ID.

Microsoft recovery now uses an exact mailbox-wide internetMessageId filter, follows continuation pages to establish uniqueness, refetches the matched message, and resolves well-known destinations to their real folder IDs. A verified message already in the intended destination clears the pending action without another move request. A verified message elsewhere repairs the queued ID and authorizes one retry. Folder discovery also identifies Deleted Items, Archive and Junk aliases for future actions.

Persist a recovery version so older failed recoveries get one attempt with the improved lookup. The claim survives restart; successful previous repairs do not trigger repeated automatic recovery. Missing, ambiguous, incomplete or changed identities remain pending. This change handles messages in Deleted Items; it does not infer permanent deletion from a missing search result.

Validation:

• Solution build: zero warnings/errors.
• All 579 tests passed.
• Twelve new regression cases use the real Microsoft provider, HTTP fixtures, encrypted store, provider router and Busy processor. They cover primary/shared mailboxes, fresh/legacy paused deletes, changed subjects and IDs, paginated ambiguity, repeated continuation links, refetch identity changes, folder aliases, missing destination reporting, and persisted recovery claims. Completed deletes issue only GET requests.

[coderabbitai]

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