v0.50.2

What's Changed

• feat(recordengine): trace key discovery and prune irrelevant parts by @tdakkota in #814
• perf(engine): admit readers during staged metric writes by @tdakkota in #813
• perf(engine): reuse planned series index ranges during reads by @tdakkota in #815
• perf(engine): stop counts after a complete existence proof by @tdakkota in #816
• perf(engine): globally order metric flush parts for range pruning by @tdakkota in #818
• perf(engine): reduce metric frame amplification for sparse reads by @tdakkota in #819
• perf(engine): reuse immutable decoder metadata within the block-cache budget by @tdakkota in #821
• perf(engine): seek string matcher postings directly by @tdakkota in #822
• perf(engine): add timestamp-only count grids by @tdakkota in #823

Full Changelog: v0.50.1...v0.50.2