Show original format name for FFmpeg-transcoded files

[systemblueteam]

When comparing compressed files (mp3, aac, m4a), the report shows "WAV" because sf.info() reads the transcoded temp file.

Map the original file suffix to a display name in load_audio() and use that for format_name in metadata.

[coderabbitai]

🔗 Related PRs

#45 - feat: add ffmpeg fallback for compressed audio formats (#19) [merged]

---

📝 Issue Planner

_{Check the box below or use the @coderabbitai plan command to generate an implementation plan and prompts that you can use with your favorite coding assistant.}

• Create Plan

---

🧪 Issue enrichment is currently in open beta.

You can configure auto-planning by selecting labels in the issue_enrichment configuration.

To disable automatic issue enrichment, add the following to your .coderabbit.yaml:

issue_enrichment:
  auto_enrich:
    enabled: false

💬 Have feedback or questions? Drop into our discord!

[jaimefgdev]

Hey! Since I just implemented the fallback in the previous PR and have the context fresh, I'd love to take care of this one. Could you assign it to me please?

[systemblueteam]

Feel free to pick up any open issue, no assignment needed.

[systemblueteam]

@jaimefgdev just realized that you were actually following our guidelines by commenting lol! i'm actually changing our contribution rule so that people can just pick it up. Thanks for being here! - Shelton