Resolve Addresses Batch For Project

Project-scoped batch resolve for both in-project surfaces — the import dialog (Door 2) and chat paste.

The county scope is the project's canonical county_fips (derived server-side, never client-supplied), so a paste can't resolve outside the project's county; a project with no county scope is a 404. Resolution runs against the project's sandbox — internal misses fall through to the forward geocoder (it resolves points against a project) instead of classifying as not_in_dataset like the pre-project batch must.