feat: lattice mental models integration

v1.2.0: diff-tool command, config validation

v1.1.0: shell completions, service management

Add integration tests for CLI commands

Production hardening pass 2: expand Go test coverage

Add Go tests for diff, state packages + production hardening

Rewrite READMEs — user docs + developer reference

Formula: update sha256 with GitHub release checksums

Add watch, status commands + distribution packaging

Add Go CLI phase 2: refresh, init, ack commands

Add Go CLI phase 1: clwatch diff + list

rename: cliwatch → clwatch

feat: implement cliwatch CLI core commands and local data sync