doc-truth & behavior wave; first-class install

Wave summary (2026-09-08, main 2097026):

• doc-truth: budget 900->1000, --json trailing, per-verb -h spec pointers, merge contract truth
• behavior: ci run stdout verdict, create --state rejected loudly, wiki human size, fractional created
• install: f0rge release install [latest|ver|main] + --dry-run + prebuilt fast-copy
• 85/85 tests; skill 991B/15ln (<=1000)