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/object-id.ts

@@ -1,5 +1,8 @@
 const CHARS = '0123456789abcdef';
 
+// same as meid
+export const objectIdRegExp = /^[0-9a-f]{24}$/;
+
 function getTime(time: number) {
 	if (time < 0) time = 0;
 	if (time === 0) {
@@ -24,3 +27,9 @@ function getRandom() {
 export function genObjectId(date: Date): string {
 	return getTime(date.getTime()) + getRandom();
 }
+
+export function parseObjectId(id: string): { date: Date; } {
+	return {
+		date: new Date(parseInt(id.slice(0, 8), 16) * 1000),
+	};
+}