models/microsoft/Phi-3-mini-128k-instruct/t3000/functional (1x8 mesh port)

[yieldthought]

Port this t3000 model from a 2x4 mesh to a 1x8 mesh (TP=8).

Target: models/microsoft/Phi-3-mini-128k-instruct/t3000/functional

Tasks:

• Update models/microsoft/Phi-3-mini-128k-instruct/t3000/functional/model.py to set MESH_SHAPE = (1, 8) and adjust any mesh-axis/sharding assumptions for a 1x8 mesh.
• Keep architecture, dtypes, and cache behavior unchanged.
• Run demo + long eval:
  python demo.py models/microsoft/Phi-3-mini-128k-instruct/t3000/functional/model.py
  python eval.py models/microsoft/Phi-3-mini-128k-instruct/t3000/functional/model.py --model microsoft/Phi-3-mini-128k-instruct --prompt_file prompts/bringup_eval_long.txt --max_new_tokens 100 --max_seq_len
• Update MODELS.md for the t3000 row and save demo.log/eval.log under models/microsoft/Phi-3-mini-128k-instruct/t3000/functional/.

Notes:

• Keep paged attention / paged KV cache behavior unchanged.
• If TT metal cache error: set TT_METAL_CACHE=/tmp/tt-metal-cache and TT_METAL_RUNTIME_ROOT=/proj_sw/user_dev/moconnor/tt-runtime-root.