[performance] cache more database calls, reduce required database calls overall (#3290)

* improvements to caching for lists and relationship to accounts / follows

* fix nil panic in AddToList()

* ensure list related caches are correctly invalidated

* ensure returned ID lists are ordered correctly

* bump go-structr to v0.8.9 (returns early if zero uncached keys to be loaded)

* remove zero checks in uncached key load functions (go-structr now handles this)

* fix issues after rebase on upstream/main

* update the expected return order of CSV exports (since list entries are now down by entry creation date)

* rename some funcs, allow deleting list entries for multiple follow IDs at a time, fix up more tests

* use returning statements on delete to get cache invalidation info

* fixes to recent database delete changes

* fix broken list entries delete sql

* remove unused db function

* update remainder of delete functions to behave in similar way, some other small tweaks

* fix delete user sql, allow returning on err no entries

* uncomment + fix list database tests

* update remaining list tests

* update envparsing test

* add comments to each specific key being invalidated

* add more cache invalidation explanatory comments

* whoops; actually delete poll votes from database in the DeletePollByID() func

* remove added but-commented-out field

* improved comment regarding paging being disabled

* make cache invalidation comments match what's actually happening

* fix up delete query comments to match what is happening

* rename function to read a bit better

* don't use ErrNoEntries on delete when not needed (it's only needed for a RETURNING call)

* update function name in test

* move list exclusivity check to AFTER eligibility check. use log.Panic() instead of panic()

* use the poll_id column in poll_votes for selecting votes in poll ID

* fix function name

internal/cache/cache.go

@@ -62,7 +62,6 @@ func (c *Caches) Init() {
 	log.Infof(nil, "init: %p", c)
 
 	c.initAccount()
-	c.initAccountIDsFollowingTag()
 	c.initAccountNote()
 	c.initAccountSettings()
 	c.initAccountStats()
@@ -84,11 +83,13 @@ func (c *Caches) Init() {
 	c.initFollowIDs()
 	c.initFollowRequest()
 	c.initFollowRequestIDs()
+	c.initFollowingTagIDs()
 	c.initInReplyToIDs()
 	c.initInstance()
 	c.initInteractionRequest()
 	c.initList()
-	c.initListEntry()
+	c.initListIDs()
+	c.initListedIDs()
 	c.initMarker()
 	c.initMedia()
 	c.initMention()
@@ -105,7 +106,6 @@ func (c *Caches) Init() {
 	c.initStatusFave()
 	c.initStatusFaveIDs()
 	c.initTag()
-	c.initTagIDsFollowedByAccount()
 	c.initThreadMute()
 	c.initToken()
 	c.initTombstone()
@@ -148,7 +148,6 @@ func (c *Caches) Stop() {
 // significant overhead to all cache writes.
 func (c *Caches) Sweep(threshold float64) {
 	c.DB.Account.Trim(threshold)
-	c.DB.AccountIDsFollowingTag.Trim(threshold)
 	c.DB.AccountNote.Trim(threshold)
 	c.DB.AccountSettings.Trim(threshold)
 	c.DB.AccountStats.Trim(threshold)
@@ -168,11 +167,13 @@ func (c *Caches) Sweep(threshold float64) {
 	c.DB.FollowIDs.Trim(threshold)
 	c.DB.FollowRequest.Trim(threshold)
 	c.DB.FollowRequestIDs.Trim(threshold)
+	c.DB.FollowingTagIDs.Trim(threshold)
 	c.DB.InReplyToIDs.Trim(threshold)
 	c.DB.Instance.Trim(threshold)
 	c.DB.InteractionRequest.Trim(threshold)
 	c.DB.List.Trim(threshold)
-	c.DB.ListEntry.Trim(threshold)
+	c.DB.ListIDs.Trim(threshold)
+	c.DB.ListedIDs.Trim(threshold)
 	c.DB.Marker.Trim(threshold)
 	c.DB.Media.Trim(threshold)
 	c.DB.Mention.Trim(threshold)
@@ -189,7 +190,6 @@ func (c *Caches) Sweep(threshold float64) {
 	c.DB.StatusFave.Trim(threshold)
 	c.DB.StatusFaveIDs.Trim(threshold)
 	c.DB.Tag.Trim(threshold)
-	c.DB.TagIDsFollowedByAccount.Trim(threshold)
 	c.DB.ThreadMute.Trim(threshold)
 	c.DB.Token.Trim(threshold)
 	c.DB.Tombstone.Trim(threshold)