docs: refresh README, contributing guide, and wiki accuracy

[davida-ps]

User description

Summary

• refresh root docs (README.md, CONTRIBUTING.md, AGENTS.md) to match current wiki/workflow/project conventions
• correct stale wiki statements around signed-feed status, workflow triggers, and frontend wiki route/llms exports
• fix NanoClaw module doc path references and update CI security-scan language (gitleaks is local pre-push, not a workflow)

Validation

• npm run build
• npm run gen:wiki-llms

Notes

• intentionally excluded local untracked files (.mcp.json, results.sarif)

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Generated description

Below is a concise technical summary of the changes proposed in this PR:
Updates the project's documentation, including the README and wiki, to accurately reflect current workflows, signed-feed status, and NanoClaw integration. Introduces a legacy advisory feed URL in constants.ts and the frontend to ensure backward compatibility while transitioning to the canonical hosted endpoint.

Topic	Details
Feed Compatibility	Implements LEGACY_ADVISORY_FEED_URL in constants.ts and updates AdvisoryDetail.tsx and FeedSetup.tsx to provide a fallback mechanism for advisory fetching. Modified files (3) constants.ts pages/AdvisoryDetail.tsx pages/FeedSetup.tsx Latest Contributors(2) User Commit Date david.a@prompt.security feat-enhance-support-f... February 25, 2026 David.a@prompt.security chore-constants-update... February 05, 2026
Documentation	Refreshes the root documentation and wiki pages to align with the completed signed-feed migration and updated CI/CD workflow triggers. Modified files (15) AGENTS.md CONTRIBUTING.md README.md wiki/architecture.md wiki/data-flow.md wiki/dependencies.md wiki/migration-signed-feed.md wiki/modules/automation-release.md wiki/modules/frontend-web.md wiki/modules/nanoclaw-integration.md wiki/overview.md wiki/security-signing-runbook.md wiki/security.md wiki/testing.md wiki/workflow.md Latest Contributors(2) User Commit Date david.a@prompt.security feat-wiki-add-full-in-... February 26, 2026 aldo@osstek.com fix-portability-harden... February 25, 2026

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