v0.7.2

Fixed

- Added project recipes to `make lint` and `make test`, so GNU Make no longer
  appends Servicepack's inherited recipes. The commands now run their intended
  Chatz checks once and do not attempt Docker from inside the dev container.

Changed

- Updated Servicepack from v1.8.1 to v1.9.0. Future framework updates leave
  Chatz's downstream-owned `docs/` and `tests/` trees untouched.
- Updated Servicepack to v1.9.1. Update backups now archive only tracked and
  unignored local files, and the updater rejects a framework file hidden by
  `.gitignore` before it can produce an incomplete commit.
- Corrected contributor documentation to describe Chatz's current test tiers,
  generation targets, Docker workflow, and Servicepack ownership boundaries.