# 14. Implement Linux feed fetcher service

meta:
  id: native-business-logic-migration-14
  feature: native-business-logic-migration
  priority: P0
  depends_on: [native-business-logic-migration-11]
  tags: [implementation, linux, networking]

objective:
- Implement feed fetching service with libsoup

deliverables:
- feed-fetcher.vala
- http-auth-credentials.vala
- fetch-result.vala
- network-error.vala
- Feed caching implementation

tests:
- Unit: Test SoupSession configuration
- Unit: Test HTTP auth handling
- Unit: Test error cases (timeout, 404, etc.)
- Integration: Test fetching real feeds

acceptance_criteria:
- Feeds fetch with proper timeout (15s)
- HTTP auth supported
- Error handling complete
- Response caching implemented
- Performance: <5s for typical feed

validation:
- Run `meson test -C build`
- Test with network throttling

notes:
- Use libsoup-3.0
- Implement exponential backoff for retries
- Respect Cache-Control headers
