[feature] Implement following hashtags (#3141)

* Implement followed tags API

* Insert statuses with followed tags into home timelines

* Test following and unfollowing tags

* Correct Swagger path params

* Trim conversation caches

* Migration for followed_tags table

* Followed tag caches and DB implementation

* Lint and tests

* Add missing tag info endpoint, reorganize tag API

* Unwrap boosts when timelining based on tags

* Apply visibility filters to tag followers

* Address review comments

internal/config/config.go

@@ -193,6 +193,7 @@ type HTTPClientConfiguration struct {
 type CacheConfiguration struct {
 	MemoryTarget                      bytesize.Size `name:"memory-target"`
 	AccountMemRatio                   float64       `name:"account-mem-ratio"`
+	AccountIDsFollowingTagMemRatio    float64       `name:"account-ids-following-tag-mem-ratio"`
 	AccountNoteMemRatio               float64       `name:"account-note-mem-ratio"`
 	AccountSettingsMemRatio           float64       `name:"account-settings-mem-ratio"`
 	AccountStatsMemRatio              float64       `name:"account-stats-mem-ratio"`
@@ -232,6 +233,7 @@ type CacheConfiguration struct {
 	StatusFaveMemRatio                float64       `name:"status-fave-mem-ratio"`
 	StatusFaveIDsMemRatio             float64       `name:"status-fave-ids-mem-ratio"`
 	TagMemRatio                       float64       `name:"tag-mem-ratio"`
+	TagIDsFollowedByAccountMemRatio   float64       `name:"tag-ids-followed-by-account-mem-ratio"`
 	ThreadMuteMemRatio                float64       `name:"thread-mute-mem-ratio"`
 	TokenMemRatio                     float64       `name:"token-mem-ratio"`
 	TombstoneMemRatio                 float64       `name:"tombstone-mem-ratio"`

internal/config/defaults.go

@@ -157,6 +157,7 @@ var Defaults = Configuration{
 		// file have been addressed, these should
 		// be able to make some more sense :D
 		AccountMemRatio:                   5,
+		AccountIDsFollowingTagMemRatio:    1,
 		AccountNoteMemRatio:               1,
 		AccountSettingsMemRatio:           0.1,
 		AccountStatsMemRatio:              2,
@@ -196,6 +197,7 @@ var Defaults = Configuration{
 		StatusFaveMemRatio:                2,
 		StatusFaveIDsMemRatio:             3,
 		TagMemRatio:                       2,
+		TagIDsFollowedByAccountMemRatio:   1,
 		ThreadMuteMemRatio:                0.2,
 		TokenMemRatio:                     0.75,
 		TombstoneMemRatio:                 0.5,

internal/config/helpers.gen.go

@@ -2775,6 +2775,37 @@ func GetCacheAccountMemRatio() float64 { return global.GetCacheAccountMemRatio()
 // SetCacheAccountMemRatio safely sets the value for global configuration 'Cache.AccountMemRatio' field
 func SetCacheAccountMemRatio(v float64) { global.SetCacheAccountMemRatio(v) }
 
+// GetCacheAccountIDsFollowingTagMemRatio safely fetches the Configuration value for state's 'Cache.AccountIDsFollowingTagMemRatio' field
+func (st *ConfigState) GetCacheAccountIDsFollowingTagMemRatio() (v float64) {
+	st.mutex.RLock()
+	v = st.config.Cache.AccountIDsFollowingTagMemRatio
+	st.mutex.RUnlock()
+	return
+}
+
+// SetCacheAccountIDsFollowingTagMemRatio safely sets the Configuration value for state's 'Cache.AccountIDsFollowingTagMemRatio' field
+func (st *ConfigState) SetCacheAccountIDsFollowingTagMemRatio(v float64) {
+	st.mutex.Lock()
+	defer st.mutex.Unlock()
+	st.config.Cache.AccountIDsFollowingTagMemRatio = v
+	st.reloadToViper()
+}
+
+// CacheAccountIDsFollowingTagMemRatioFlag returns the flag name for the 'Cache.AccountIDsFollowingTagMemRatio' field
+func CacheAccountIDsFollowingTagMemRatioFlag() string {
+	return "cache-account-ids-following-tag-mem-ratio"
+}
+
+// GetCacheAccountIDsFollowingTagMemRatio safely fetches the value for global configuration 'Cache.AccountIDsFollowingTagMemRatio' field
+func GetCacheAccountIDsFollowingTagMemRatio() float64 {
+	return global.GetCacheAccountIDsFollowingTagMemRatio()
+}
+
+// SetCacheAccountIDsFollowingTagMemRatio safely sets the value for global configuration 'Cache.AccountIDsFollowingTagMemRatio' field
+func SetCacheAccountIDsFollowingTagMemRatio(v float64) {
+	global.SetCacheAccountIDsFollowingTagMemRatio(v)
+}
+
 // GetCacheAccountNoteMemRatio safely fetches the Configuration value for state's 'Cache.AccountNoteMemRatio' field
 func (st *ConfigState) GetCacheAccountNoteMemRatio() (v float64) {
 	st.mutex.RLock()
@@ -3758,6 +3789,37 @@ func GetCacheTagMemRatio() float64 { return global.GetCacheTagMemRatio() }
 // SetCacheTagMemRatio safely sets the value for global configuration 'Cache.TagMemRatio' field
 func SetCacheTagMemRatio(v float64) { global.SetCacheTagMemRatio(v) }
 
+// GetCacheTagIDsFollowedByAccountMemRatio safely fetches the Configuration value for state's 'Cache.TagIDsFollowedByAccountMemRatio' field
+func (st *ConfigState) GetCacheTagIDsFollowedByAccountMemRatio() (v float64) {
+	st.mutex.RLock()
+	v = st.config.Cache.TagIDsFollowedByAccountMemRatio
+	st.mutex.RUnlock()
+	return
+}
+
+// SetCacheTagIDsFollowedByAccountMemRatio safely sets the Configuration value for state's 'Cache.TagIDsFollowedByAccountMemRatio' field
+func (st *ConfigState) SetCacheTagIDsFollowedByAccountMemRatio(v float64) {
+	st.mutex.Lock()
+	defer st.mutex.Unlock()
+	st.config.Cache.TagIDsFollowedByAccountMemRatio = v
+	st.reloadToViper()
+}
+
+// CacheTagIDsFollowedByAccountMemRatioFlag returns the flag name for the 'Cache.TagIDsFollowedByAccountMemRatio' field
+func CacheTagIDsFollowedByAccountMemRatioFlag() string {
+	return "cache-tag-ids-followed-by-account-mem-ratio"
+}
+
+// GetCacheTagIDsFollowedByAccountMemRatio safely fetches the value for global configuration 'Cache.TagIDsFollowedByAccountMemRatio' field
+func GetCacheTagIDsFollowedByAccountMemRatio() float64 {
+	return global.GetCacheTagIDsFollowedByAccountMemRatio()
+}
+
+// SetCacheTagIDsFollowedByAccountMemRatio safely sets the value for global configuration 'Cache.TagIDsFollowedByAccountMemRatio' field
+func SetCacheTagIDsFollowedByAccountMemRatio(v float64) {
+	global.SetCacheTagIDsFollowedByAccountMemRatio(v)
+}
+
 // GetCacheThreadMuteMemRatio safely fetches the Configuration value for state's 'Cache.ThreadMuteMemRatio' field
 func (st *ConfigState) GetCacheThreadMuteMemRatio() (v float64) {
 	st.mutex.RLock()