Qdrant 1.15.4 release notes, 27 Aug 2025

https://github.com/qdrant/qdrant/pull/7005 - Reduce Docker image size by 10-40%
https://github.com/qdrant/qdrant/pull/7073 - Adjust metrics histogram buckets, show empty buckets and remove small ones
https://github.com/qdrant/qdrant/pull/7111 - Include SBOM in Docker image
https://github.com/qdrant/qdrant/pull/7119 - Sign Docker images with cosign
https://github.com/qdrant/qdrant/pull/7110 - Actively migrate away from old shard key format on disk to a more robust format
https://github.com/qdrant/qdrant/pull/7120 - Measure segment size on disk more reliably for improved available disk space checks

https://github.com/qdrant/qdrant/pull/7133 - Fix not loading some full text index types correctly, temporarily resulting in an empty index
https://github.com/qdrant/qdrant/pull/7109 - Fix incorrectly reusing old deleted points in proxy segments
https://github.com/qdrant/qdrant/pull/7106 - Preserve segment ID mapping when proxying all segments for a snapshot, potentially mixing up segments