refactor: delete all backup files, not just the latest

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

src/order_bak/cli.py

@@ -74,18 +74,21 @@ def delete(ctx):
     if not backup_files:
         click.echo("No backup files found in ./backups")
         raise SystemExit(1)
-    csv_file = backup_files[-1]
 
     import csv as csv_mod
-    with open(csv_file, newline="") as f:
+    total = 0
-        count = sum(1 for _ in csv_mod.DictReader(f))
+    for f in backup_files:
+        with open(f, newline="") as fh:
+            total += sum(1 for _ in csv_mod.DictReader(fh))
+        click.echo(f"  {f}")
 
-    click.echo(f"Will delete {count} orders from {csv_file}")
+    click.echo(f"Will delete {total} orders from {len(backup_files)} file(s)")
     if not click.confirm("Continue?"):
         click.echo("Aborted")
         return
 
     table = TableClient.from_connection_string(cfg.azure_connection_string, table_name="order")
+    for csv_file in backup_files:
         delete_orders(
             table_client=table,
             csv_path=csv_file,