v0.5.2

Fix 15 design principle violations found by codex audit

Docs: update CLAUDE.md command list (8 not 6), fix README command table, event types, run.json example, architecture. Remove stale references to run/migrate commands and non-existent files.

Code: fix exit codes (no-subcommand=2, unverified=2), add input validation for all --run-dir inputs, remove raw ADB instructions from schema, fix error hint text.