fix: extend forgejo_auth_token table (part two)

Add the default value of the purpose field to both the table and the
migration. The table in v9 and v7 backport already have the default
value.

ALTER TABLE `forgejo_auth_token` ADD `purpose` TEXT NOT NULL [] - Cannot add a NOT NULL column with default value NULL

models/auth/auth_token.go

@@ -39,7 +39,7 @@ type AuthorizationToken struct {
 	UID             int64  `xorm:"INDEX"`
 	LookupKey       string `xorm:"INDEX UNIQUE"`
 	HashedValidator string
-	Purpose         AuthorizationPurpose `xorm:"NOT NULL"`
+	Purpose         AuthorizationPurpose `xorm:"NOT NULL DEFAULT 'long_term_authorization'"`
 	Expiry          timeutil.TimeStamp
 }
 

models/forgejo_migrations/v24.go

@@ -8,7 +8,7 @@ import "xorm.io/xorm"
 func AddPurposeToForgejoAuthToken(x *xorm.Engine) error {
 	type ForgejoAuthToken struct {
 		ID      int64  `xorm:"pk autoincr"`
-		Purpose string `xorm:"NOT NULL"`
+		Purpose string `xorm:"NOT NULL DEFAULT 'long_term_authorization'"`
 	}
 	if err := x.Sync(new(ForgejoAuthToken)); err != nil {
 		return err