feat(api): add recent-tracks endpoint

[luke-h1]

Adds GET /api/recent-tracks to power the new /tracks page on lhowsam.com.

What

• Returns recently scrobbled Last.fm tracks, each with a nowPlaying flag and a playedAt unix timestamp (null for the currently playing track)
• Optional limit query param (1-50, default 10), CDN-cached with short revalidation
• Parameterises LastFmApi.GetRecentTracks with a limit (now-playing still fetches 1)
• New RecentTrackResponseItem / RecentTracksApiResponse models + source-gen registration
• Documented in CONTEXT.md

Tests

Added an endpoint test covering mapping, the nowPlaying flag, and timestamp parsing. All 38 tests pass.

[coderabbitai]

Warning

Review limit reached

@luke-h1, you've reached your PR review limit, so we couldn't start this review.

Next review available in: 57 minutes

Enable usage-based reviews in Billing to review now. Otherwise, wait until the next included review is available.
You're only billed for reviews past your plan's rate limits ($0.25/file).

How can I continue?

After more reviews become available, a review can be triggered using the @coderabbitai review command as a PR comment. Alternatively, push new commits to this PR.

To avoid repeated limits, reduce automatic review volume by pausing incremental auto-reviews earlier, using label-based review opt-in, excluding WIP or generated PR titles, or requesting reviews manually when the PR is ready. If your team needs uninterrupted high-volume reviews, an organization admin can enable usage-based reviews.

How do review limits work?

CodeRabbit enforces per-developer PR review limits for each organization. Most developers receive the normal plan review availability.

For paid Pro and Pro+ PR reviews, CodeRabbit uses adaptive limits for sustained high-volume activity. When a developer's recent PR review activity reaches the 95th percentile or higher among CodeRabbit users, additional reviews become available more gradually as earlier reviews age out of the rolling window.

Please refer docs for additional details.

Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: b7273022-b38f-45a1-a3f5-74f944b158f2

📥 Commits

Reviewing files that changed from the base of the PR and between d0260b2 and 1093e27.

📒 Files selected for processing (6)

• CONTEXT.md
• src/Lho.Lambda.Tests/ApiFunctionTests.cs
• src/Lho.Lambda/Clients/LastFm/LastFmApi.cs
• src/Lho.Lambda/Functions/ApiFunction.cs
• src/Lho.Lambda/Models/LastFm.cs
• src/Lho.Lambda/Serialization/ApiResponseJsonContext.cs

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/recent-tracks-endpoint

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}

[github-actions]

🚀 Staging Deployment

• Version: staging-pr.219.cd16a60
• URL: https://nowplaying-staging.lhowsam.com
• Health: https://nowplaying-staging.lhowsam.com/api/health
• Version API: https://nowplaying-staging.lhowsam.com/api/version