feat: IMAP COMPRESS support

[link2xt]

Depends on:

• async-imap change to add IMAP COMPRESS support: feat: implement IMAP COMPRESS async-email/async-imap#112
• Fix for async-compression: fix(tokio): attempt to decode from internal state even if nothing was read Nullus157/async-compression#294

[link2xt]

Something definitely works, but decoder keeps getting stuck.

I am tracing asncy_imap and get messages like this:

2024-09-23T03:38:43.788064Z TRACE async_imap::imap_stream: decode: input: Ok("* 11271 FETCH (UID 250014 INTERNALDATE \"23-Sep-2024 04:24:12 +0200\" RFC822.SIZE 22865 BODY[HEADER.FIELDS (MESSAGE-ID DATE X-MICROSOFT-ORIGINAL-MESSAGE-ID FROM IN-REPLY-TO REFERENCES CHAT-VERSION AUTO-SUBMITTED AUTOCRYPT-SETUP-MESSAGE)] {324}\r\nFrom: <link2xt@testrun.org>\r\nDate: Mon, 23 Sep 2024 02:24:11 +0000\r\nMessage-ID: <3SkbaovObwp1qWhhfy0Op4So@localhost>\r\nIn-Reply-To: <Mr.e4JP0X8GV7p.v-yvcn-VsLC@localhost>\r\nReferences: <Mr.Uime8r9-t1g.Q7Ip2HJu8h5@loca")
2024-09-23T03:38:43.788093Z TRACE async_imap::imap_stream: decode: incomplete data, need minimum 109 bytes

Then nothing happens for a while.
Eventually fetching fails like this:

121.4s [w]core/event: 1 src/scheduler.rs:418: Failed fetch_idle: fetch_move_delete: fetch_new_messages: prefetch: io: timed out: timed out

I doubt it is Dovecot that is a problem, seems there is some problem with buffering or Poll wake up logic in async-imap.

EDIT: I filed an upstream issue rust-lang/flate2-rs#434

[link2xt]

This works now with miniz_oxide, no C dependencies added.

[Hocuri]

Would be nice to wait for async-email/async-imap#112 and a new release before merging so that we don't need to use a git dependency