Sync template from 29ac25b → v0.9.0 (29 template commits). Due to template's _subdirectory migration, new files were manually rendered rather than auto-merged by copier. New files: - .claude/CLAUDE.md + coding_philosophy.md (agent instructions) - extract utils.py: SQLite state tracking for extraction runs - extract/transform READMEs: architecture & pattern documentation - infra/supervisor: systemd service + orchestration script - Per-layer model READMEs (raw, staging, foundation, serving) Also fixes copier-answers.yml (adds 4 feature toggles, removes stale payment_provider key) and scopes CLAUDE.md gitignore to root only. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
foundation
Business logic layer: dimensions, facts, conformed metrics. May join across staging models from different sources.
Naming convention: foundation.dim_<entity>, foundation.fact_<event>