feat(labors): trilingual name — add name_en column + Labor::label() helper

- Migration: add nullable `labors.name_en` alongside existing name_ro/
  name_ru.
- Labor model: label(?locale) accessor returns name_{locale} with
  name_ro fallback.
- LaborResource form: expose 3rd 'Nume (EN)' field.
- Table + Select displays now go through label() so options show the
  locale-appropriate name:
    /app/labors table column,
    WorkOrderResource works Select ('[category] name (Nh)'),
    ServiceTemplate items Select,
    ServiceComposer WorkOrderWork snapshot on create.
- Snapshot name saved on wo_works.name at creation reflects the
  current locale; existing rows keep their stored snapshot untouched.

All 306 tests pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

lang/en.json

@@ -1279,6 +1279,7 @@
   "Number": "Number",
   "Number generated": "Number generated",
   "Nume": "Name",
+  "Nume (EN)": "Name (EN)",
   "Nume (RO)": "Name (RO)",
   "Nume (RU)": "Name (RU)",
   "Nume (descriere)": "Name (description)",

lang/ru.json

@@ -1279,6 +1279,7 @@
   "Number": "Номер",
   "Number generated": "Номер создан",
   "Nume": "Имя",
+  "Nume (EN)": "Название (EN)",
   "Nume (RO)": "Название (RO)",
   "Nume (RU)": "Название (RU)",
   "Nume (descriere)": "Название (описание)",