Merge pull request #2 from TheMattBerman/feature/pmax-retrieval-layer

Fix retrieval ladder regressions

Fix Codex review issues: date fallback, campaign ID scoping, enum handling, shared criteria filter, step numbering

Add negative inventory verification

Add shared search-term retrieval ladder

Broaden search-term retrieval by campaign

Add PMax search-term fallback mode

Merge pull request #1 from TheMattBerman/codex/v2-budget-apply

Implement v2 budget apply and release packaging

Complete Phase 2 draft layer workflow

Improve public release readiness

Fix apply-layer safety and portability issues

Initial commit: Google Ads Copilot kit