MiniMax H3 on RunPod: install/download scripts, ComfyUI wiring, benchmark harness, research docs

- scripts/pod: weight downloads (workspace + tmpfs overflow for volume quota),
  extra_model_paths.yaml, headless ComfyUI launcher, test image generator,
  one-shot pod installer
- scripts/local: auto-reconnecting port forward for the ComfyUI panel
- bench: API-based harness for t2v/i2v/ref2v across durations, resolutions,
  and weight families; CSV/JSONL results
- docs: WEIGHTS.md (what's downloaded where), RESEARCH.md (ComfyUI guides,
  no-Comfy options via SGLang/vLLM/diffusers, concurrency model, serverless)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

scripts/pod/extra_model_paths.yaml

@@ -0,0 +1,13 @@
+# ComfyUI extra model paths — points at the RunPod network volume where all
+# MiniMax H3 weights live. Install to /ComfyUI/extra_model_paths.yaml
+minimax_workspace:
+  base_path: /workspace/minimax-h3/models
+  diffusion_models: diffusion_models
+  text_encoders: text_encoders
+  vae: vae
+
+# tmpfs overflow for files that exceed the network-volume quota (~100GB).
+# EPHEMERAL — refill with download-weights-tmpfs.sh after a pod restart.
+minimax_shm:
+  base_path: /dev/shm/minimax-h3-models
+  diffusion_models: diffusion_models