fusion

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gsxdsm dd569395e8 FN-8671: isolate triage admission state in tests

Prevent leaked singleton admission state from affecting later triage polling tests.

- Add test-only coordinator reset and inspection seams for all admission categories.
- Stop tracked triage processors before clearing shared reservation and pre-held-slot state.
- Cover teardown behavior and document singleton-state isolation guidance.

Files changed:
 docs/testing.md                                   |  6 ++
 packages/engine/src/__tests__/concurrency.test.ts | 56 ++++++++++++++++
 packages/engine/src/__tests__/triage.test.ts      | 82 ++++++++++++++++++++---
 packages/engine/src/concurrency.ts                | 30 +++++++++
 4 files changed, 166 insertions(+), 8 deletions(-)

Fusion-Task-Id: FN-8671

Fusion-Task-Lineage: 41217db4-1fd6-45d6-a846-c57fc3c7052e

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

2026-08-01 00:14:32 -07:00