tutabridge

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T

Anthony 8c1c1dfc54 Keep self-send cache entries until TTL so both Sent and Inbox hit

The original implementation consumed the cache entry on first lookup,
which meant the prefetch sweep that ran first (typically the Sent
copy) got its multipart envelope rebuilt correctly, but the second
sweep (the Inbox copy, which is the one suffering from the
`File._ownerEncSessionKey` race) found an empty cache and fell back
to the failing `crypto_client.load` path — leaving its .eml body-only.

A self-send produces `load_attachments` calls for both folder copies
of the same envelope, so the cache must serve as many lookups as
arrive within the TTL. Clone the cached attachments out of the entry
instead of removing it; the existing TTL (1h) + soft cap
(50 entries) keep memory bounded. Also move the cache insert ahead of
`DraftService.post` so the WS event for the inbox copy cannot beat
the insert.

Live-verified: both Sent and Inbox copies of a self-sent mail with a
PDF attachment now expose a proper `multipart/mixed` BODYSTRUCTURE
with the file part — no more session-key-transient retry storms in the
prefetch logs.

2026-05-29 11:31:09 +02:00