Run the checks of the modules a change touched #31

Problem: on large multi-module repos the verify loop has no test: configured (running the whole suite is too slow), so nothing runs before the reviewer. In one real task the reviewer caught a frontend lint error (react/no-unescaped-entities) only by reading the diff; a lint run would have let the agent fix it itself.

Idea (no Dispatch code): a scripts/dispatch-check.sh per repo, set as the project's test:, that maps changed paths (git diff --name-only <base>) to module checks, e.g. */frontend/** -> that folder's lint + build, */backend/** -> ./gradlew :<module>:test.

If several repos need the same thing, consider a checks: map (path glob -> command) in the project config later.