Add test for ExtendCommentTreePathLength migration and fix bugs (#35791)

Co-authored-by: Mithilesh Gupta <guptamithilesh@protonmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

models/migrations/v1_26/v323.go

@@ -0,0 +1,43 @@
+// Copyright 2025 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package v1_26
+
+import (
+	"xorm.io/xorm"
+)
+
+func AddActionsConcurrency(x *xorm.Engine) error {
+	type ActionRun struct {
+		RepoID            int64 `xorm:"index(repo_concurrency)"`
+		RawConcurrency    string
+		ConcurrencyGroup  string `xorm:"index(repo_concurrency) NOT NULL DEFAULT ''"`
+		ConcurrencyCancel bool   `xorm:"NOT NULL DEFAULT FALSE"`
+	}
+
+	if _, err := x.SyncWithOptions(xorm.SyncOptions{
+		IgnoreDropIndices: true,
+	}, new(ActionRun)); err != nil {
+		return err
+	}
+
+	if err := x.Sync(new(ActionRun)); err != nil {
+		return err
+	}
+
+	type ActionRunJob struct {
+		RepoID                 int64 `xorm:"index(repo_concurrency)"`
+		RawConcurrency         string
+		IsConcurrencyEvaluated bool
+		ConcurrencyGroup       string `xorm:"index(repo_concurrency) NOT NULL DEFAULT ''"`
+		ConcurrencyCancel      bool   `xorm:"NOT NULL DEFAULT FALSE"`
+	}
+
+	if _, err := x.SyncWithOptions(xorm.SyncOptions{
+		IgnoreDropIndices: true,
+	}, new(ActionRunJob)); err != nil {
+		return err
+	}
+
+	return nil
+}