Throttle fetchDaysTraded to once per hour per client

Multiple simultaneous fills were triggering concurrent report API calls
to Tradovate for every account in the firm, causing rate limiting.
Added a 1-hour cooldown — the first call always runs (lastDaysFetch=0),
subsequent calls within the same hour are no-ops.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/tradovate-class.ts

@@ -34,6 +34,8 @@ export class TradovateClient {
 
     /** True once fetchDaysTraded() has finished its last full run */
     public fetchDaysComplete = false;
+    /** Timestamp (ms) of the last successful fetchDaysTraded run — throttled to once per hour */
+    private lastDaysFetch = 0;
     /** Last error per account name from fetchDaysTraded() */
     public lastFetchErrors: Record<string, string> = {};
     /** Raw reports API response sample per account (first 100 chars) for debugging */
@@ -313,6 +315,10 @@ export class TradovateClient {
 
     public async fetchDaysTraded(): Promise<void> {
         if (!this.accessInfo?.accessToken) return;
+        // Throttle to at most once per hour to avoid rate-limiting the reports API
+        const ONE_HOUR = 60 * 60 * 1_000;
+        if (Date.now() - this.lastDaysFetch < ONE_HOUR) return;
+        this.lastDaysFetch = Date.now();
         this.fetchDaysComplete = false;
 
         const authHeaders = { Authorization: `Bearer ${this.accessInfo.accessToken}` };