Add chapter stats to MangaTable with GraphQL sort/filter support

[everpcpc]

Summary

• Add chaptersLastReadAt, chaptersLastUploadDate, chaptersUnreadCount, chaptersTotalCount to MangaTable
• Support sorting and filtering these fields in GraphQL MangaQuery
• Auto-update stats when chapters are fetched or modified
• Add database migration M0053_AddMangaChapterStatsColumns

Related

• part of: Enhance graphql manga query #1404

[Syer10]

This should be done using joins and other database queries. It shouldn't be done by adding the columns to the manga table directly

[everpcpc]

Sorting with join queries can be very complex, especially for operations like count. The query efficiency will be very low and may greatly impact performance.

[Robonau]

write both
test the speed difference
and post findings

if the performance difference is substantial enough syer may change his mind

[Syer10]

Some test code I wrote a while ago to provide an example for the join kind of implementation.

Syer10@a88ebfb

And for asCursor I won't mind if there are @GraphqlIgnore fields in the MangaType to handle it.