fix(acms): fix failing Behave scenario for budget ordering test

The "Budget enforcement respects file ordering" scenario was adding
exactly 5 files of 1000 bytes each (total = max_total_size = 5000),
which all passed the budget check. The final step asserted that
violations existed (files beyond budget were rejected), but no
violations were generated since all 5 files fit exactly.

Fix: add a 6th file of 1000 bytes so the total would be 6000 > 5000,
causing the 6th file to be rejected with a max_total_size violation.
This makes the "no additional files should be added beyond the budget"
assertion pass correctly.

ISSUES CLOSED: #9583

features/acms/acms_budget_enforcement.feature

@@ -50,7 +50,7 @@ Feature: ACMS Budget Enforcement for max_file_size and max_total_size constraint
     And no budget violation should be generated
 
   Scenario: Budget enforcement respects file ordering
-    When I add files in order: 1000, 1000, 1000, 1000, 1000 bytes
+    When I add files in order: 1000, 1000, 1000, 1000, 1000, 1000 bytes
     Then the first 5 files should be included
     And the total context size should be 5000 bytes
     And no additional files should be added beyond the budget