fix(plan): a Claude plan is the one Anthropic reports now, not the sign-in's

An account signed in on Pro and upgraded to Max 5x kept showing "Pro": the
plan was read only from .credentials.json / .claude.json, whose
subscriptionType and rate-limit tiers are written at sign-in. fetchOwner
already asks GET /api/oauth/profile for a token's owner; it now also reads
organization_type / rate_limit_tier / seat_tier into a plan
(planFromProfile), remembered per account uuid (rememberLivePlan). The live
row, saved profiles (identityOf) and pool accounts (poolStatus, whose quota
refresh now asks a login's owner too) show that plan when one was seen
(shownPlan), else planLabel of the files as before.

server/__tests__/claude-pool.test.js

@@ -26,6 +26,7 @@ const pty = require("../lib/pty-run");
 
 const TOKEN = (c) => `sk-ant-oat01-${c.repeat(40)}`;
 const realFetchUsage = ccUsage.fetchUsage;
+const realFetchOwner = ccUsage.fetchOwner;
 
 function run(id, account, { status = "completed", session = null, started, ended = null } = {}) {
   db.prepare(
@@ -61,10 +62,12 @@ before(() => {
   ccUsage.fetchUsage = async () => {
     throw Object.assign(new Error("offline"), { code: "EUNAUTHORIZED" });
   };
+  ccUsage.fetchOwner = async () => null;
 });
 
 after(() => {
   ccUsage.fetchUsage = realFetchUsage;
+  ccUsage.fetchOwner = realFetchOwner;
   tmux.__setExecImpl(null);
   fs.rmSync(TMP, { recursive: true, force: true });
 });