Revert schema change: remove expected_socket_* from sim_config to match dataset features

Replace sim_script_py with socket/thread metrics + slow‑mo Blender script

Update M3 prompt; add expected socket targets (script ref)

Add full task spec to question; keep schema id, question, sim_config

Simplify schema: id, question, sim_config only

Normalize: user-only prompt, inline sim_script_py, remove local paths

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