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gsxdsm c60a11607f FN-8856: bound scheduler hold-release sweep work

Keep hold-release scheduling and dashboard health checks responsive under PostgreSQL load.

- Batch and cache workflow-selection reads for each hold-release pass.
- Bound sweep execution, prevent overlapping project passes, and expose sweep instrumentation.
- Time-bound PostgreSQL health probes and add regression coverage.

Files changed:
 .changeset/fn-8856-hold-release-sweep-bounded.md   |   7 +
 docs/architecture.md                               |   6 +
 docs/diagnostics.md                                |   4 +
 .../__tests__/workflow-ir-selection-cache.test.ts  |  77 ++++
 packages/core/src/index.ts                         |   2 +
 packages/core/src/store.ts                         |   6 +-
 .../core/src/task-store/workflow-definitions.ts    |  25 ++
 .../core/src/workflows/workflow-ir-resolver.ts     |  27 +-
 .../__tests__/dashboard-postgres-health.test.ts    |  76 ++++
 .../dashboard/src/dashboard-postgres-health.ts     |  34 +-
 .../__tests__/hold-release-instrumentation.test.ts |  34 ++
 .../hold-release-sweep-bounded-db-work.test.ts     | 467 +++++++++++++++++++++
 packages/engine/src/execution/hold-release.ts      | 391 +++++++++--------
 packages/engine/src/scheduler.ts                   |  56 ++-
 14 files changed, 1021 insertions(+), 191 deletions(-)

Fusion-Task-Id: FN-8856

Fusion-Task-Lineage: 5fa55d95-0760-4c4d-8c6c-6e1805109b3c

Co-authored-by: Fusion (runfusion.ai) <noreply@runfusion.ai>

2026-08-09 04:37:47 -07:00