fix: improve order resilience with precision and minimum quantity fallbacks, and fix rate-limiting on account fetch

main.py

@@ -113,7 +113,8 @@ def run_ticker_lifecycle(client, yf_ticker, t212_ticker, tz, num_tickers):
                 params['ticker'] = t212_ticker
                 
                 # Anti-thundering-herd: Random jitter to prevent 429s from parallel threads
-                time.sleep(random.uniform(0.1, 3.0))
+                # Use a larger range (1-10s) to better stagger independent threads
+                time.sleep(random.uniform(1.0, 10.0))
                 
                 # Fetch Account Balance to calculate risk with backoff
                 for attempt in range(3):
@@ -129,8 +130,9 @@ def run_ticker_lifecycle(client, yf_ticker, t212_ticker, tz, num_tickers):
                         break 
                     except Exception as e:
                         if '429' in str(e):
-                            logger.warning(f"Rate limited on account fetch for {yf_ticker}. Retrying...")
-                            time.sleep(2**(attempt+1))
+                            wait_time = (attempt + 1) * 5 + random.uniform(1, 3)
+                            logger.warning(f"Rate limited on account fetch for {yf_ticker}. Retrying in {wait_time:.1f}s...")
+                            time.sleep(wait_time)
                         else:
                             logger.error(f"Failed to fetch account info: {e}")
                             break
@@ -270,4 +272,10 @@ def main():
     flush_logs()
 
 if __name__ == "__main__":
-    main()
+    try:
+        main()
+    except Exception as e:
+        logger.critical(f"FATAL ERROR in main: {e}", exc_info=True)
+    finally:
+        flush_logs()
+        logger.info("Bot process terminated.")