Feat/cs/handle recoverable with filter

[ReagentX]

• 70% performance improvement when using filters -s, -e, and/or -t
• Fix Recoverable deleted messages are omitted when --conversation-filter is set #426
• Fix ImageMagick and FFmpeg not discovered on Arch Linux #420

[ReagentX]

The major change here is to the SQL we use to generate the message stream:

SELECT
    m.*,
    c.chat_id,
    (SELECT COUNT(*) FROM message_attachment_join a WHERE m.ROWID = a.message_id) as num_attachments,
    d.chat_id as deleted_from,
    (SELECT COUNT(*) FROM message m2 WHERE m2.thread_originator_guid = m.guid) as num_replies
FROM
    message as m
LEFT JOIN chat_message_join as c ON m.ROWID = c.message_id
LEFT JOIN chat_recoverable_message_join as d ON m.ROWID = d.message_id
WHERE
    (c.chat_id IN (1, 2, 3) OR d.chat_id IN (1, 2, 3))
ORDER BY
    m.date;

Previously, we used

SELECT
    m.*,
    c.chat_id,
    (SELECT COUNT(*) FROM MESSAGE_ATTACHMENT_JOIN a WHERE m.ROWID = a.message_id) as num_attachments,
    (SELECT b.chat_id FROM RECENTLY_DELETED b WHERE m.ROWID = b.message_id) as deleted_from,
    (SELECT COUNT(*) FROM MESSAGE m2 WHERE m2.thread_originator_guid = m.guid) as num_replies
FROM
    message as m
LEFT JOIN CHAT_MESSAGE_JOIN as c ON m.ROWID = c.message_id
WHERE
    c.chat_id IN (1, 2, 3)
ORDER BY
    m.date;

The salient difference is that we query for deleted_from in a LEFT JOIN, allowing us to filter chat_id in both places: (c.chat_id IN (1, 2, 3) OR d.chat_id IN (1, 2, 3)).