Reuse existing free ZeroGPU slot for SadTalker (audio-driven talking avatar) - already-owned space, no new resource created

bump duration to 420s to allow room for upscale step

restore full quality (50 steps, 340s) now that PRO is active

lower ZeroGPU duration to 110s + steps to 12 for free-tier

Update requirements.txt

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Update README.md

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Update models/transformer_consisid.py

Update models/pipeline_consisid.py

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Update app.py