chore: organize docs — move 37 files from root into docs/ subfolders
Root now contains only essential files:
README.md, CLAUDE.md, CHANGELOG.md, CONTRIBUTING.md
Reorganized into:
docs/audits/ — all audit reports & checklists (71 files)
docs/architecture/ — codebase overview, implementation plan
docs/guides/ — auth guide, implementation checklist
docs/load-testing/ — k6 load test guides & endpoints
docs/security/ — payment & security reviews
Also removed 5 untracked debug/investigation files and
cleaned up playwright-report/ & test-results/ artifacts.
Co-Authored-By: Claude Opus 4 (1M context) <noreply@anthropic.com>
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