Trade only on loaded history; catch early TopstepX fills; fix SI/M2K point values

- Both clients track which accounts this process has loaded history for
  (historyReady). An account restarted, rebuilt, wiped or newly listed is
  ineligible until its fetch lands, instead of trading as a fresh stage-1
  first day; a failed fetch with no cache no longer reads as empty history.
  Waiting accounts get a targeted fetch on the next sync.
- Tradovate holds an account whose start-of-day balance moves without a fill
  (a payout between hourly Cash History runs) until a Cash History books it,
  so a payout-pending account isn't re-traded on its ended cycle.
- Wipe routes forget history through the client and count accounts whose
  history didn't come back as failures.
- TopstepX sendOrder picks up a fill that arrived before the place response,
  and its REST backstop uses the documented Trade/search and Order/search.
- POINT_VALUES: SI 5000 (was 50), M2K 5 (was 10).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/api/accounts/[id]/wipe/route.ts

@@ -23,23 +23,19 @@ export async function POST(_req: Request, { params }: { params: Promise<{ id: st
         wipeAccountData(accountId);
 
         // Clear the in-memory view too — a failed refetch must leave the
-        // account visibly empty, not showing the data that was just wiped.
-        delete client.dailyPnL[accountId];
-        delete client.fullDailyPnL[accountId];
-        delete client.daysTraded[accountId];
-        delete client.priorProfit[accountId];
-        delete client.lastFundDates[accountId];
-        delete client.fundTransactions[accountId];
-        delete client.lastFetchErrors[account.name];
-        delete client.lastFetchRaw[account.name];
+        // account visibly empty, not showing the data that was just wiped —
+        // and out of trading until a fetch rebuilds it.
+        client.forgetHistory(accountId, account.name);
 
         await client.fetchDaysTraded([accountId]);
 
+        const loaded = client.historyReady(accountId);
         return NextResponse.json({
             ok: true,
             entries: (client.dailyPnL[accountId] ?? []).length,
             daysTraded: client.daysTraded[accountId] ?? 0,
-            fetchError: client.lastFetchErrors[account.name] ?? null,
+            fetchError: client.lastFetchErrors[account.name]
+                ?? (loaded ? null : 'History did not reload — the account stays out of trading until it does'),
         });
     }