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feat: implement rate limiting and caching layer for MusicBrainz provider

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- Add golang.org/x/time/rate dependency for token-bucket rate limiting
- Replace custom channel-based rate limiter with rate.NewLimiter(1, 1)
- Add context.Context support to doGet for cancellation
- Add cached_at column to external_releases via migration 005
- Implement cache hit/miss queries with TTL-based filtering
- Add CacheStats type for tracking cached RGIDs
- Update ExternalRelease struct with CachedAt field
- Add rate limiting tests (1 req/sec enforcement, burst behavior)
- Add cache tests (hit, miss, expired, mixed, empty artist)
- Update migration count test for new migration
This commit is contained in:
Vladimir Zagainov
2026-05-26 12:15:28 +03:00
parent 674daed93b
commit b0f69d3a4f
10 changed files with 518 additions and 119 deletions
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go.mod
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@@ -7,3 +7,5 @@ require (
github.com/mattn/go-sqlite3 v1.14.22
gopkg.in/yaml.v3 v3.0.1
)
require golang.org/x/time v0.15.0