[chore] Migrate accounts to new table, relax uniqueness constraint of actor url and collections

internal/cache/db.go

@@ -304,15 +304,18 @@ func (c *Caches) initAccount() {
 
 	c.DB.Account.Init(structr.CacheConfig[*gtsmodel.Account]{
 		Indices: []structr.IndexConfig{
+			// Unique fields.
 			{Fields: "ID"},
 			{Fields: "URI"},
-			{Fields: "URL"},
-			{Fields: "Username,Domain", AllowZero: true},
 			{Fields: "PublicKeyURI"},
-			{Fields: "InboxURI"},
-			{Fields: "OutboxURI"},
-			{Fields: "FollowersURI"},
-			{Fields: "FollowingURI"},
+			{Fields: "Username,Domain", AllowZero: true},
+
+			// Potentially non-unique fields.
+			{Fields: "URL", Multiple: true},
+			{Fields: "InboxURI", Multiple: true},
+			{Fields: "OutboxURI", Multiple: true},
+			{Fields: "FollowersURI", Multiple: true},
+			{Fields: "FollowingURI", Multiple: true},
 		},
 		MaxSize:    cap,
 		IgnoreErr:  ignoreErrors,

internal/cache/size.go

@@ -240,13 +240,12 @@ func sizeofAccount() uintptr {
 		DisplayName:             exampleUsername,
 		Note:                    exampleText,
 		NoteRaw:                 exampleText,
-		Memorial:                func() *bool { ok := false; return &ok }(),
+		MemorializedAt:          exampleTime,
 		CreatedAt:               exampleTime,
 		UpdatedAt:               exampleTime,
 		FetchedAt:               exampleTime,
-		Bot:                     func() *bool { ok := true; return &ok }(),
-		Locked:                  func() *bool { ok := true; return &ok }(),
-		Discoverable:            func() *bool { ok := false; return &ok }(),
+		Locked:                  util.Ptr(true),
+		Discoverable:            util.Ptr(false),
 		URI:                     exampleURI,
 		URL:                     exampleURI,
 		InboxURI:                exampleURI,
@@ -254,7 +253,7 @@ func sizeofAccount() uintptr {
 		FollowersURI:            exampleURI,
 		FollowingURI:            exampleURI,
 		FeaturedCollectionURI:   exampleURI,
-		ActorType:               ap.ActorPerson,
+		ActorType:               gtsmodel.AccountActorTypePerson,
 		PrivateKey:              &rsa.PrivateKey{},
 		PublicKey:               &rsa.PublicKey{},
 		PublicKeyURI:            exampleURI,