[Feature]: Different Scripts when creating more than one video

[luciomerlo]

需求描述 | Problem Statement

If i choose to create 5 videos per run, there should be an option to regenerate script and keywords, to obtain 5 different videos, as some combinations of parameters always give the same 5 videos

建议的解决方案 | Proposed Solution

There should be an option to regerenate Script & Keywords every time a video is created, so the LLM would run 5 times to change the script (the system should check they are giving 5 different answers)

I am using llama-3.3-70b-versatile as a model under Groq and sometimes it doesnt create many different scripts.

[harry0703]

This overlaps with the batch workflow in #1243, where each task can generate its own script. I’m keeping this open until that PR is finalized and verified.