[QA] ✅ VERIFIED - All acceptance criteria met. Directory structure matches PLAN.md exactly, pip install -e . succeeds, all __init__.py files created, Makefile targets working. Package imports correctly (version 0.1.0). See /tmp/qa-CDEV-1.md for detailed verification report.

## Implementation Complete ### Changes Made - Created directory structure matching PLAN.md: - `app/` with `api/`, `db/`, `services/` subpackages - `scripts/` directory (empty, ready for generate_api_key.py) - `tests/` directory with `__init__.py` - Created `pyproject.toml` with all specified dependencies from PLAN.md - Created `__init__.py` files for all packages (app, app/api, app/db, app/services, tests) - Created `Makefile` with targets: install, dev, test, lint, format, clean - Added `.gitignore` for Python/IDE/DB artifacts ### Verification - `pip install -e .` succeeds - `python -c 'from app import __version__; print(__version__)'` outputs 0.1.0 - Directory structure matches PLAN.md exactly