Return status codes for health checks

[justinhartman]

Summary

• return 200 responses only when the requested health checks succeed and surface 400/503 status codes for invalid or failing dependencies
• add optional target filtering for embed domain checks while validating unsupported targets
• update controller tests to cover HTTP status handling and domain selection paths

Testing

• CI=true bun run test -- --runInBand
• CI=true bun run test:coverage -- --runInBand

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Codex Task

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Project	Deployment	Preview	Comments	Updated (UTC)
imdb-app	Ready	Preview	Comment	Dec 3, 2025 8:02am

[chatgpt-codex-connector]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (5a69054) to head (45006a8).
⚠️ Report is 5 commits behind head on develop.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff            @@
##           develop       #61   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           21        21           
  Lines         1799      1844   +45     
  Branches       141       154   +13     
=========================================
+ Hits          1799      1844   +45     

Flag	Coverage Δ
tests	100.00% <100.00%> (ø)

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