[feature] User muting (#2960)

* User muting

* Address review feedback

* Rename uniqueness constraint on user_mutes to match convention

* Remove unused account_id from where clause

* Add UserMute to NewTestDB

* Update test/envparsing.sh with new and fixed cache stuff

* Address tobi's review comments

* Make compiledUserMuteListEntry.expired consistent with UserMute.Expired

* Make sure mute_expires_at is serialized as an explicit null for indefinite mutes

---------

Co-authored-by: tobi <tobi.smethurst@protonmail.com>

testrig/db.go

@@ -56,6 +56,7 @@ var testModels = []interface{}{
 	&gtsmodel.ThreadMute{},
 	&gtsmodel.ThreadToStatus{},
 	&gtsmodel.User{},
+	&gtsmodel.UserMute{},
 	&gtsmodel.Emoji{},
 	&gtsmodel.Instance{},
 	&gtsmodel.Notification{},
@@ -338,6 +339,12 @@ func StandardDBSetup(db db.DB, accounts map[string]*gtsmodel.Account) {
 		}
 	}
 
+	for _, v := range NewTestUserMutes() {
+		if err := db.Put(ctx, v); err != nil {
+			log.Panic(nil, err)
+		}
+	}
+
 	if err := db.CreateInstanceAccount(ctx); err != nil {
 		log.Panic(nil, err)
 	}