What's Changed

• feat(proxy): add blob size filtering for prefetch by @hweawer in https://github.com/uber/kraken/pull/460
• Refactor in preparation for adding more sophisticated cache cleanup policies by @Anton-Kalpakchiev in https://github.com/uber/kraken/pull/461
• Support threshold-based eviction for store cache cleanup by @Anton-Kalpakchiev in https://github.com/uber/kraken/pull/462
• Support custom policy- and threshold-based cache eviction cleanup by @Anton-Kalpakchiev in https://github.com/uber/kraken/pull/463
• [store] Improve blob cache clean up with heuristics by @Anton-Kalpakchiev in https://github.com/uber/kraken/pull/464
• feat(blobserver): Add PrefetchBlob API to origin by @Anton-Kalpakchiev in https://github.com/uber/kraken/pull/459
• feat(proxyserver): Add PrefetchImage V2 API that is idempotent by @Anton-Kalpakchiev in https://github.com/uber/kraken/pull/467
• fix(blobserver): Remove Error log on 202 Accepted from DownloadBlob and GetMetainfo by @Anton-Kalpakchiev in https://github.com/uber/kraken/pull/468
• fix(ci): allow CI to run for non-master branch PRs by @sambhav-jain-16 in https://github.com/uber/kraken/pull/481
• feat(proxyserver): Add observability for PrefetchImage API by @Anton-Kalpakchiev in https://github.com/uber/kraken/pull/469
• fix(.github/labeler): improve labeler action by @sambhav-jain-16 in https://github.com/uber/kraken/pull/484
• feat(util/cache): add blob memory cache implementation by @sambhav-jain-16 in https://github.com/uber/kraken/pull/471
• feat(lib/store): setup memory cache config in castore by @sambhav-jain-16 in https://github.com/uber/kraken/pull/472
• feat(lib/store): initialize memory cache in castore by @sambhav-jain-16 in https://github.com/uber/kraken/pull/473
• feat(lib/metainfogen): add method to generate metainfo from bytes by @sambhav-jain-16 in https://github.com/uber/kraken/pull/474
• feat(store/base): create an in-memory read writer by @sambhav-jain-16 in https://github.com/uber/kraken/pull/475
• feat(utils/cache): add method to reserve cache space by @sambhav-jain-16 in https://github.com/uber/kraken/pull/476
• feat(lib): use in-memory cache in blob download by @sambhav-jain-16 in https://github.com/uber/kraken/pull/477
• feat(lib/store): implement drain workers in castore by @sambhav-jain-16 in https://github.com/uber/kraken/pull/478
• feat(lib/store): integrate memcache in read paths by @sambhav-jain-16 in https://github.com/uber/kraken/pull/479
• test(test): add integ tests for mem cache by @sambhav-jain-16 in https://github.com/uber/kraken/pull/480
• fix(lib/store): initialise BufferedReadWriter with size by @sambhav-jain-16 in https://github.com/uber/kraken/pull/493

Full Changelog: https://github.com/uber/kraken/compare/v0.1.12...v0.1.13