docs: add last updated timestamp to README

[migmartri]

Adds a "Last updated" timestamp line below the header links in the README.

This change was produced with AI assistance (Claude Code).

🤖 Posted by Maximus bot (Claude Code) on behalf of @migmartri

[chainloop-platform]

PR validation — ⚠️ 2 failing

Status	Policy	Material	Messages
⚠️ Failed	pr-min-approvals	pr-info	PR/MR #3641 has 0 approving reviews, 1 required.
✅ Passed	pr-description-required	pr-info	-
⚠️ Failed	pr-user-story-linked	pr-info	PR/MR #3641 does not reference a user story or issue in title, description, or branch 'docs: add last updated timestamp to README'. Expected patterns: ["(?i)[A-Z]+-[0-9]+", "#[0-9]+", "(?i)gh-[0-9]+", "(?i)\\[[A-Z]+-[0-9]+\\]"]

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AI Session Checks — 🟢 92% · ✅ 0 failing

Avg score	Sessions	Failing policies	Attribution	Files	Lines	Total Duration
🟢 92%	1	✅ 0	100% AI / 0% Human	1	+2 / -0	39s

🟢 92% — 100% AI — ✅ All policies passing

Oct 16, 2026 13:15 UTC · 39s · $0.80 · 16 in / 1.8k out · claude-code 2.1.301 (claude-opus-5-5)

_{View session details ↗}

Change Summary

• Adds a centered Last updated UTC timestamp line to README.md.
• Creates branch chore/readme-timestamp from upstream/main and prepares a signed commit/push flow.

AI Session Overall Score

🟢 92% — Docs-only request stayed aligned and scoped, with other lanes naturally abstaining.

AI Session Analysis Breakdown

🟢 94% · alignment

🟢 README edit inserted the requested UTC timestamp without visible drift. · High Impact

🟢 92% · scope-discipline

🟢 Only README was touched before the commit attempt. · High Impact

🟢 88% · context-and-planning

🟢 The opening request gave enough direction for a one-step docs task. · Medium Impact

abstained · solution-quality

🟡 Solution quality was not assessed because the session only edited documentation. · Low Severity

abstained · user-trust-signal

🟡 User trust signal was not assessed because the transcript contains only the opening request. · Low Severity

abstained · verification

🟡 Verification was not assessed because the README timestamp edit changed no runtime behavior. · Low Severity

Missing criteria: solution-quality, user-trust-signal, verification

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File Attribution

████████████████████ 100% AI / 0% Human

Status	Attribution	File	Lines
modified	ai	README.md	+2 / -0

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Policies (5)

Status	Policy	Material	Messages
✅ Passed	ai-session-no-auto-pr	ai-coding-session-86ebe0	-
✅ Passed	ai-config-ai-agents-allowed	ai-coding-session-86ebe0	-
✅ Passed	ai-config-no-dangerous-commands	ai-coding-session-86ebe0	-
✅ Passed	ai-config-no-secrets	ai-coding-session-86ebe0	-
✅ Passed	ai-config-mcp-servers-allowed	ai-coding-session-86ebe0	-

Security Checks — ✅ 5 passing

✅ secret-scan

Status	Policy	Messages
✅ Passed	secrets-detection	-

✅ sast-scan

Status	Policy	Messages
✅ Passed	owasp-top10-2025	-
✅ Passed	sast	-
✅ Passed	cwe-top25	-
✅ Passed	cwe-top26-40-cusp	-

Scans not applied (3)

Scan	Reason
vulnerability-scan	no manifest/lockfile changed
github-actions-scan	no workflow files changed
iac-scan	no IaC files changed

_{View attestation ↗}

Security context

✅ Nothing this change touches has a recorded security-fix history.

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[cubic-dev-ai]

No issues found across 1 file

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