chore: initialize Gitea v1.27.2 fork

Includes direct password setup links in registration emails.

Assisted-by: Codex:GPT-5

models/db/install/db.go

@@ -0,0 +1,59 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package install
+
+import (
+	"context"
+
+	"gitea.dev/models/db"
+	"gitea.dev/modules/setting"
+)
+
+// CheckDatabaseConnection checks the database connection
+func CheckDatabaseConnection(ctx context.Context) error {
+	_, err := db.GetEngine(ctx).Exec("SELECT 1")
+	return err
+}
+
+// GetMigrationVersion gets the database migration version
+func GetMigrationVersion(ctx context.Context) (int64, error) {
+	var installedDbVersion int64
+	x := db.GetEngine(ctx)
+	exist, err := x.IsTableExist("version")
+	if err != nil {
+		return 0, err
+	}
+	if !exist {
+		return 0, nil
+	}
+	_, err = x.Table("version").Cols("version").Get(&installedDbVersion)
+	if err != nil {
+		return 0, err
+	}
+	return installedDbVersion, nil
+}
+
+// HasPostInstallationUsers checks whether there are users after installation
+func HasPostInstallationUsers(ctx context.Context) (bool, error) {
+	x := db.GetEngine(ctx)
+	exist, err := x.IsTableExist("user")
+	if err != nil {
+		return false, err
+	}
+	if !exist {
+		return false, nil
+	}
+
+	// if there are 2 or more users in database, we consider there are users created after installation
+	threshold := 2
+	if !setting.IsProd {
+		// to debug easily, with non-prod RUN_MODE, we only check the count to 1
+		threshold = 1
+	}
+	res, err := x.Table("user").Cols("id").Limit(threshold).Query()
+	if err != nil {
+		return false, err
+	}
+	return len(res) >= threshold, nil
+}