Archived obsolete reports and journal entries, introducing a clear archival structure under `_archive`. Moved and reorganized onboarding guides and tech stack references into updated directories (`02_Guides`, `01_Architecture/Reference/Tech_Stack`). Improved overall documentation structure and consistency.
Applied a unified header format to all documentation files for better status identification, referencing, and ownership tracking. Archived outdated roadmaps, reports, and journal entries. Updated playbooks with new responsibilities, lifecycle rules, and consistent handover formats to align with the new archiving strategy.
