ci/woodpecker/pr/ci Pipeline was successful
Rebased onto next post-#1278. README + skills/mosaic-forge/SKILL.md document the FORGE_NO_EXECUTOR fail-closed rule + --simulate (fast-follow to RI-2-001, now merged). TASKS.md rows updated to measured state: RI-0-001/RI-1-001/RI-1-002/RI-2-001 done (merged with reviews+CI evidence); RI-2-002/RI-3-001/RI-4-001/RI-5-001 in-progress (PRs open, approved, merge-queued); RI-3-002/RI-V-001 not-started.