ba0185df

By: Michael Lynch <git@mtlynch.io>

Run tinybeans import before e2e tests to use real imported data

Add an import-from-tinybeans Nix package and update the e2e-tests
derivation to run the import tool against testdata/tinybeans-export
before starting the app server. The app now receives --media-dir and
--metadata pointing at the imported output directory.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>