Initial commit: Arb Pulse monolith with CI and optional Fly deploy.

Real-time BTC cross-exchange arbitrage detection (Kraken, Bybit, OKX, Binance)
with React dashboard, GitHub Actions CI, and documented Fly.io deploy workflow.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/application/use-cases/rebalance-inventory.ts

@@ -0,0 +1,10 @@
+import type { IRebalancer } from "../../domain/ports/ports.js";
+
+/** Periodic inventory correction (withdrawal fee only here, not per trade). */
+export class RebalanceInventory {
+  constructor(private readonly rebalancer: IRebalancer) {}
+
+  tick(now: number): void {
+    this.rebalancer.tick(now);
+  }
+}