Refresh project documentation to reflect current state of the platform including recent features, test improvements, and QA status. Co-Authored-By: Paperclip <noreply@paperclip.ing>
Add comprehensive project documentation including changelog, QA tracker, code quality audit, implementation guide, K6 load testing guide, frontend exploration notes, and file mapping reference. Co-Authored-By: Paperclip <noreply@paperclip.ing>