fix(i18n): add missing translation key for molecule destroy cleanup

Add 'Cleaning up: running molecule destroy for {scenario}' to
translations.json with proper translations for all 6 languages
(bg, de, en, pl, ru, zh). This key was introduced in d8919ae but
the translation entry was missing, causing CI lint to fail.

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Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

src/devx/translations.json

@@ -3830,5 +3830,13 @@
     "pl": "[check-test-speed] CI environment detected — scaling limits by {factor}x (total: {orig}s → {eff}s, per-test: {orig_s}s → {eff_s}s)",
     "ru": "[check-test-speed] CI environment detected — scaling limits by {factor}x (total: {orig}s → {eff}s, per-test: {orig_s}s → {eff_s}s)",
     "zh": "[check-test-speed] CI environment detected — scaling limits by {factor}x (total: {orig}s → {eff}s, per-test: {orig_s}s → {eff_s}s)"
+  },
+  "Cleaning up: running molecule destroy for {scenario}": {
+    "en": "Cleaning up: running molecule destroy for {scenario}",
+    "bg": "Изчистване: изпълнение на molecule destroy за {scenario}",
+    "de": "Aufräumen: molecule destroy wird ausgeführt für {scenario}",
+    "pl": "Czyszczenie: uruchamianie molecule destroy dla {scenario}",
+    "ru": "Очистка: запуск molecule destroy для {scenario}",
+    "zh": "清理：正在为 {scenario} 运行 molecule destroy"
   }
-}
+}