Per sub-project-2 plan Task 9 / spec §6.4. Three keyless first-ship fetchers
parse documented JSON APIs via an injected HttpClient; license/attribution go
through tools.licensing; NASA third-party + IA no-license cases are flagged in
notes for review. musopen/fma/freesound are explicit deferred stubs raising
NotImplementedError; freesound documents FREESOUND_API_TOKEN (secret, env-only).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Ben Stull