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/local/port-forward.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+# Persistent port forward: localhost:8188 -> pod ComfyUI.
+# Auto-reconnects if the tunnel drops. Ctrl-C to stop.
+# Requires the echelon key loaded in your ssh agent.
+POD_HOST=216.243.220.136
+POD_PORT=14278
+while true; do
+  ssh -N -L 8188:127.0.0.1:8188 \
+    -o ServerAliveInterval=30 -o ServerAliveCountMax=3 \
+    -o ExitOnForwardFailure=yes \
+    -o StrictHostKeyChecking=accept-new \
+    -p "$POD_PORT" root@"$POD_HOST"
+  echo "tunnel dropped, reconnecting in 3s..."
+  sleep 3
+done