nx_forge_model_fetch.nx

nx_forge_model_fetch.nx -- L3: sovereign BIG-FILE downloader (Range loop) for model weights. usage: nx_forge_model_fetch <urlfile> <outpath> <expected-bytes> urlfile = file whose content is the (signed CDN) URL -- URLs are shell-hostile, never argv outpath = absolute output path (additive staging: NEVER point at the proven live model) expected = exact byte size (from the origin's X-Linked-Size header) Streams 16MB RFC-9110 Range chunks over sovereign TLS-1.3 (nx_https_fetch_range), appends to outpath, sha256's the stream incrementally, RESUMES from existing size (re-hashing the prefix), retries each chunk 3x. Exits 0 only when size == expected; prints the sha256 hex for comparison against the origin ETag. license_tier: ORIGINAL expect_exit: 0