fix(knowledge_fs): format research threshold metrics

knowledge-fs/.harness/changes/2026-08-25-research-score-threshold-test-intent.md

@@ -3,6 +3,7 @@
 ## What changed
 
 - Updated the score-threshold retrieval test plan to use the supported `direct` research intent.
+- Applied the repository formatter's required layout to the associated retrieval metric expression.
 
 ## Why
 
@@ -12,6 +13,7 @@
 
 - `pnpm --filter @knowledge/api typecheck`
 - `pnpm --filter @knowledge/api test -- research-evidence-retrieval.test.ts`
+- `pnpm lint:backend`
 
 ## Risks and follow-up
 

knowledge-fs/packages/api/src/research-evidence-retrieval.ts

@@ -831,9 +831,7 @@ function combineResearchMetrics({
     researchStrategyVersion: "research-evidence-v3",
     researchSufficiencyReached: sufficiencyReached,
     researchSupplementalSearches: supplementalSearches,
-    ...(scoreThresholdFilteredCandidates === undefined
-      ? {}
-      : { scoreThresholdFilteredCandidates }),
+    ...(scoreThresholdFilteredCandidates === undefined ? {} : { scoreThresholdFilteredCandidates }),
     totalMs,
   };
 }