#12 spec: wiki/release/init procedures + json orders undocumented

spec/schema.md defines the release entity and wiki index line but not: wiki put/get/list flags + path-safety + 256KiB cap + list --json order (path,title,size); release create --notes file|- + build/out gitignored + ordering + create-upsert + list/view --json orders; init skeleton dirs/files + gitignore lines + idempotency. Add terse subsections; no format change.