05/31 Phase 7: fixed fetch fx rate

scripts/fetch_fx_rate.py

@@ -1,7 +1,8 @@
 #!/usr/bin/env python3
 """
-Cron script: fetch daily USD/VND exchange rate.
+Cron script: fetch daily USD/VND exchange rate via yfinance.
 Run by systemd timer pfm-fxrate.timer at 8AM daily.
+Always force-refreshes regardless of cache.
 """
 
 import sys
@@ -9,17 +10,18 @@ import os
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 
 from app import create_app
-from app.services.fx_service import get_today_rate
+from app.services.fx_service import force_refresh
 
 app = create_app()
 
 if __name__ == '__main__':
     with app.app_context():
-        result = get_today_rate()
+        print('[fx_rate] Fetching fresh USD/VND rate...')
+        result = force_refresh()
         if result:
-            status = '(stale)' if result.get('is_stale') else ''
-            print(f"[fx_rate] 1 USD = {result['rate']:,.0f} VND "
-                  f"[{result['source']}] {result['date']} {status}")
+            status = '(stale fallback)' if result.get('is_stale') else ''
+            print(f'[fx_rate] 1 USD = ₫{result["rate"]:,.0f} VND '
+                  f'[{result["source"]}] {result["date"]} {status}')
         else:
-            print("[fx_rate] Failed to fetch rate.")
+            print('[fx_rate] Failed to fetch rate from all sources.')
             sys.exit(1)