docs: sync PRs #1042-#1061 to aeon docs

[aaronjmars]

Sync of merged aeonfun/aeon PRs #1042-#1061 into the aeon repo docs. Source of truth = merged PRs; this propagates what shipped.

PR window

#1042-#1061 (skips #1041 = the prior run's own docs sync). Also reconciles #1039 and #954, which merged below the sync watermark and were never documented in this repo's CHANGELOG.

Surfaces changed

• catalog/skill-icons.json + apps/dashboard/lib/skill-icons.data.ts + new docs/assets/skill-icons/miroshark-matchday.svg - glyph for the miroshark-matchday skill (Add miroshark-matchday skill: weekly bulk football matchday sims + video handoff #1056), generated by bin/generate-skill-icons (--check clean)
• docs/skill-packs.md - <img> glyph prefix on the miroshark-matchday catalog row (Crypto count already 19 from Add miroshark-matchday skill: weekly bulk football matchday sims + video handoff #1056)
• Setup skill .claude/skills/aeon/** + byte-identical plugin/skills/aeon/** - literal catalog counts 80 to 81 (footers, pack breakdown Crypto 18 to 19, survey denominators 43 of 81 / 64 of 81, all 81 skills)
• CHANGELOG.md [Unreleased] - one Keep-a-Changelog block for this batch

Signal PRs documented

• Add miroshark-matchday skill: weekly bulk football matchday sims + video handoff #1056 new miroshark-matchday skill (Crypto, 80 to 81)
• feat(competitor-monitor): opt-in table-row diffing for list pages #1043 competitor-monitor opt-in [rows] table-row diffing
• fix(harness): keep memory/ and output/ writable in read-only sandbox #1042 read-only sandbox keeps memory/ + output/ writable
• fix(aeon): read-only guard stub loses every skill's memory/logs baseline #1051 read-only guard writes the ### <skill> baseline log
• fix(aeon): commit a read-only skill's failure log, not just its success #1052 read-only failure log committed too
• fix(chain): distinguish no-action telemetry #1053 chain no-action telemetry
• fix(vuln-scanner): bound the trufflehog filesystem scan, forbid backgrounding scanners #1054 vuln-scanner bounds the trufflehog filesystem scan
• fix(vuln): keep github-trending feed machine-parseable for the scanner #1055 github-trending feed kept machine-parseable
• fix: close two aeon-update/changelog gaps that land downstream sync PRs CI-red #1061 aeon-update + changelog skills close CI-red sync gaps
• feat(vuln-scanner): add Riva research kernel #1039 (reconciled) vuln-scanner Riva research kernel - merged below watermark
• feat: add cortx-reliability skill — x402 endpoint reliability check #954 (already reconciled) cortx-reliability

Bundled as maintenance (noise)

#1044, #1046, #1047, #1048, #1049, #1050 (dependency bumps), #1057 (test tolerance), #1058 (CI trigger path)

Validators run locally: generate-skill-icons --check OK, validate-readme-catalog OK (6 packs / 81 skills), check-skill-categories OK, check-capabilities-parity OK.