Pull request 2111: 6545-schema-version

Updates #6545.

Squashed commit of the following:

commit b1969128a99ff21c97feb4e7805b4b8133d7122f
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Fri Dec 15 20:04:37 2023 +0300

    home: fix import

commit 872ccea1491a8da76cc24db79247438d0ce4d256
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Fri Dec 15 20:01:15 2023 +0300

    all: output schema version

internal/configmigrate/v12.go

@@ -0,0 +1,43 @@
+package configmigrate
+
+import (
+	"time"
+
+	"github.com/AdguardTeam/golibs/timeutil"
+)
+
+// migrateTo12 performs the following changes:
+//
+//	# BEFORE:
+//	'schema_version': 11
+//	'querylog_interval': 90
+//	# …
+//
+//	# AFTER:
+//	'schema_version': 12
+//	'querylog_interval': '2160h'
+//	# …
+func migrateTo12(diskConf yobj) (err error) {
+	diskConf["schema_version"] = 12
+
+	dns, ok, err := fieldVal[yobj](diskConf, "dns")
+	if !ok {
+		return err
+	}
+
+	const field = "querylog_interval"
+
+	qlogIvl, ok, err := fieldVal[int](dns, field)
+	if !ok {
+		if err != nil {
+			return err
+		}
+
+		// Set the initial value from home.initConfig function.
+		qlogIvl = 90
+	}
+
+	dns[field] = timeutil.Duration{Duration: time.Duration(qlogIvl) * timeutil.Day}
+
+	return nil
+}