Add numerical awareness convergence lab with proof artifacts and roadmap links

Extend numerical foundations with implementation artifacts and roadmap evidence

Add numerical foundations and linear algebra norms with proof artifacts

Add inscart end-to-end ML system proof with interview artifacts

Remove empty roadmap breakdown files

Establish the README structure across the repository

Add practice areas for scenarios, projects, resources, and scripts

Create proof buckets for evidence-based progression

Add retrospective structure with first monthly review

Add journal structure and lock weekly format

Add concepts track with learning system and first math note

Create architecture documentation skeleton

Add public entry files and roadmap baseline