曲の情報を取得できる

This issue has no description.

The issue body contains no implementation details, files, tests, or entry points. First clarify which song source and information should be retrieved, where the result should appear, and how success will be verified; then inspect the repository structure and existing entry points. Done means the agreed song information can be retrieved and the behavior is covered by an appropriate verification.

Written by the indexing model from the issue text.