#7 f0rge readers: issues/prs/tasks/ci/labels

Context: Core read path. Real shape is dir-per-entity (see wiki/plan). This is the biggest render issue; keep it mechanical. Tasks:

• Readers: issues/<uuid>/issue.md (+comments count), prs/<uuid>/pr.md (+patch.diff as <pre>, comments count, reviews list), tasks/<uuid>.md grouped todo|doing|blocked|done, ci/ci.env + steps/*.sh names + latest runs/<ts>/summary.md w/ verdict badge, labels.md/milestones.md for names.
• Number derivation: sort (created,id) rank 1-based at build; display number, link by uuid.
• Wire real counts + CI verdict into index header (replace m1 stubs, remove TODO).
• Unknown fields ignored silently; missing required -> skip + stderr warn, build stays 0. Success rubric:
• Against ../f0rge/.forge (large real forge): build exits 0; issue/PR counts match f0rge issue list --json counts; spot-check 5 numbers match rank; one intentionally-broken copy (missing title) warns + skips.
• patch.diff shown escaped; tasks columns correct; CI badge matches latest run verdict. Swarm: Owl with supervision (biggest surface). Branch m3/forge-readers.