feat: implement Sunset and Deprecation headers for legacy AI routes - #331
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…nd Redis sliding window rate limiter
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…nd Redis sliding window rate limiter (ChainForgee#331)
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Closes #266
This pull request introduces RFC-compliant
SunsetandDeprecationheaders for all legacy/ai/*API paths, addressing the missing signals needed by mobile and frontend clients to migrate towards the versioned/v1/ai/*equivalents. Additionally, it integrates a Redis-based sliding window rate limiter to replace the in-process Map-based limiter.Verification Results
308 Temporary/Permanent Redirectcontaining the headersDeprecation: trueandSunset: Thu, 01 Oct 2026 00:00:00 GMTwhen using the default environment settings./ai/ocrreturns400/422with headers appended./health,/ai/metrics, etc.) are unaffected and do not emit these headers.