M14 Build Launch Package

Added:
- docs/40-build-launch/BUILD_SUCCESS_DEFINITION.md
- docs/40-build-launch/SPRINT_1_SCOPE_FREEZE.md
- docs/40-build-launch/DATA_ACQUISITION_PLAYBOOK.md
- docs/40-build-launch/GOLDEN_DATASET_PACKAGE.md
- docs/40-build-launch/BUILD_ORDER_GRAPH.md
- docs/40-build-launch/MODULE_ACCEPTANCE_CRITERIA.md
- docs/40-build-launch/CODEX_STOP_RULES.md
- docs/40-build-launch/RELEASE_STRATEGY.md
- docs/40-build-launch/RISK_REGISTER.md
- docs/40-build-launch/BACKLOG_PRIORITIES_MOSCOW.md
- docs/40-build-launch/FOLDER_OWNERSHIP.md
- prompts/codex/m14/CODEX_FIRST_DAY_MASTER_PROMPT.md
- checklists/SPRINT_1_OPERATOR_CHECKLIST.md
- release/v0.1-foundation-target.md
- scripts/validate_m14_launch_assets.py

Updated:
- README.md
- CODEX_START.md
- docs/00-start/START_HERE.md
- Makefile
- scripts/run_readiness_check.sh