fix(server): IdService.parseを全てのidタイプに対応させるように (#10533)

* wip fix-id

* ✌️

* fix import

packages/backend/src/misc/id/meidg.ts

@@ -3,6 +3,7 @@ const CHARS = '0123456789abcdef';
 //  4bit Fixed hex value 'g'
 // 44bit UNIX Time ms in Hex
 // 48bit Random value in Hex
+export const meidgRegExp = /^g[0-9a-f]{23}$/;
 
 function getTime(time: number) {
 	if (time < 0) time = 0;
@@ -26,3 +27,9 @@ function getRandom() {
 export function genMeidg(date: Date): string {
 	return 'g' + getTime(date.getTime()) + getRandom();
 }
+
+export function parseMeidg(id: string): { date: Date; } {
+	return {
+		date: new Date(parseInt(id.slice(1, 12), 16)),
+	};
+}