idz: Remove profile ext id

Turns out (while researching team creation) the profile ext id
is just the aime id. After creating a team a profile discovery
request is immediately issued with the "profile id" in the field
that holds the aime id during initial profile load.

src/idz/decoder/saveStocker.ts

@@ -1,10 +1,9 @@
 import { bitmap } from "./_bitmap";
 import { chara } from "./_chara";
 import { RequestCode } from "./_defs";
-import { BackgroundCode, ExtId } from "../model/base";
 import { CarSelector } from "../model/car";
-import { Profile } from "../model/profile";
 import { SaveStockerRequest } from "../request/saveStocker";
+import { AimeId } from "../../model";
 
 saveStocker.msgCode = 0x00a6 as RequestCode;
 saveStocker.msgLen = 0x00c0;
@@ -12,7 +11,7 @@ saveStocker.msgLen = 0x00c0;
 export function saveStocker(buf: Buffer): SaveStockerRequest {
   return {
     type: "save_stocker_req",
-    profileId: buf.readUInt32LE(0x0004) as ExtId<Profile>,
+    aimeId: buf.readUInt32LE(0x0004) as AimeId,
 
     backgrounds: bitmap(buf.slice(0x0008, 0x002c)),
     selectedCar: buf.readUInt16LE(0x009c) as CarSelector,