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723f7b2cf7
upaas/internal/middleware
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user 723f7b2cf7 fix: add eviction for stale IP rate limiter entries and Retry-After header 
- Store lastSeen timestamp per IP limiter entry
- Lazy sweep removes entries older than 10 minutes on each request
- Add Retry-After header to 429 responses
- Add test for stale entry eviction

Fixes memory leak under sustained attack from many IPs.
2026-02-15 14:18:07 -08:00
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middleware.go fix: add eviction for stale IP rate limiter entries and Retry-After header 2026-02-15 14:18:07 -08:00
ratelimit_test.go fix: add eviction for stale IP rate limiter entries and Retry-After header 2026-02-15 14:18:07 -08:00