fix: ornith-first post-setup manifest ordering

tonight-hardening: wllama paths fix, setup v4 (resume+sha256), models.json, runbook

r3: banned-substring reword (runtime)

v3: GGUF fetcher + wllama 3.6.1 vendoring — transformers.js/ONNX setup removed per owner directive

single-model fetcher (use models/download_models.py for the full set)