Reconstruct TopstepX MLL floors from the EOD balance curve

TopstepX never reports the Maximum Loss Limit, but it's deterministic:
floor = min(0, eodBalanceHigh − trailingDrawdown), locking at the $0
starting balance. The EOD curve rebuilds from daily P&L + fund events,
with off-book fee drift spread across days proportionally to reported
fees (validated against a platform-reported MLL to ~$0.10). Stored in
autoLiqThresholds — negative, or +$0.01 once locked — so dead detection,
dashboards, and the ruin model's startThreshold all use the real room.
Guards move from '> 0' to '!== 0'; 0 still means no floor. canTrade=false
accounts are skipped. daily_pnl gains a fees column for the weighting.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

lib/auto-trade.ts

@@ -22,7 +22,9 @@ import { getSetting, setSetting } from './db';
 // ── helpers ──────────────────────────────────────────────────────────────────
 
 function isAccountDead(amount: number, autoLiqThreshold: number): boolean {
-    return autoLiqThreshold > 0 && amount <= autoLiqThreshold;
+    // Tradovate floors are positive balances; reconstructed TopstepX MLL
+    // floors are negative (or +$0.01 once locked at breakeven). 0 = no floor.
+    return autoLiqThreshold !== 0 && amount <= autoLiqThreshold;
 }
 
 // In-memory runaway guard: legs fired per account per trade date, plus the sum