Validated in a combined sub-batch worktree off release/v3.8.51 tip.
- Focused test: exclusive-session-observability.test.ts — part of sub-batch's 165/165 node:test run
- typecheck:core, file-size, changelog-integrity, complexity, cognitive-complexity — all OK
- Full-repo lint: 228 pre-existing dashboard react-hooks/* findings, unrelated to this diff
Thanks for the narrow failure boundary and the privacy-conscious warning (proven not to leak the caught error's sensitive fields) — a projection failure discarding valid legacy data was a real regression from #11389.
Merged into release/v3.8.51 via batch validation: exclusive-session-observability unit+UI suites green on the combined tree, static gates green. Nice additive observability layer over the #10362 lease backend — thanks @KaspaPulse!
