Trigger auto-translation for new languages on selected platforms

Enqueues AI auto-translation of the given languages for the chosen platforms. One event is fired per (platform x language), skipping each platform's own base language.

curl -X POST "https://example.com/api/v2/products/auto-translate" \  -H "Content-Type: application/json" \  -d '{    "languageIds": [      2,      3,      4    ],    "projectTypeIds": [      10,      11    ]  }'

{  "message": "Accepted"}