Add missing scheduler/scheduler_config.json to q4/q8/bf16 tiers (fixes false-incomplete gate, GH SceneWorks/SceneWorks#1858)

sc-8711: bf16/model_index.json

sc-8711: bf16/tokenizer

sc-8711: bf16/vae

sc-8711: bf16/text_encoder

sc-8711: bf16/transformer

sc-8711: q8

sc-8711: q4

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initial commit