fix(FN-5103): expose own commit shas in attribution helper

Fusion-Task-Id: FN-5103
Fusion-Task-Lineage: e4e4d9ba-4884-4feb-b18b-a30e799c3fb1

packages/engine/src/__tests__/branch-attribution.test.ts

@@ -19,6 +19,7 @@ describe("FN-5039 branch-attribution", () => {
       files: [],
       foreignCommits: [],
       ownCommitCount: 0,
+      ownCommitShas: [],
       rawDiffFileCount: 0,
       commitAttributions: [],
     });

packages/engine/src/branch-attribution.ts

@@ -25,6 +25,7 @@ export interface AttributionResult {
   files: string[];
   foreignCommits: { sha: string; subject: string; attributedTaskId: string | null }[];
   ownCommitCount: number;
+  ownCommitShas?: string[];
   rawDiffFileCount: number;
   commitAttributions: { sha: string; subject: string; source: AttributionSource; attributed: boolean; attributedTaskId: string | null }[];
 }
@@ -134,7 +135,7 @@ export async function filterFilesToOwnTaskCommits(opts: BranchAttributionOptions
   );
 
   if (!logOutput.trim()) {
-    return { files: [], foreignCommits: [], ownCommitCount: 0, rawDiffFileCount, commitAttributions: [] };
+    return { files: [], foreignCommits: [], ownCommitCount: 0, ownCommitShas: [], rawDiffFileCount, commitAttributions: [] };
   }
 
   const fileSet = new Set<string>();
@@ -188,6 +189,7 @@ export async function filterFilesToOwnTaskCommits(opts: BranchAttributionOptions
     files: [...fileSet].sort((a, b) => a.localeCompare(b)),
     foreignCommits,
     ownCommitCount: ownCommitShas.length,
+    ownCommitShas,
     rawDiffFileCount,
     commitAttributions,
   };