fix: retain stock identities in research and AI task lists

internal/integration/candidate_analysis_test.go

@@ -129,6 +129,11 @@ func testCandidateAI(t *testing.T, ctx context.Context, pool *pgxpool.Pool, admi
 	if err != nil || len(results) != 4 {
 		t.Fatal("durable results missing", err, len(results))
 	}
+	for _, result := range results {
+		if result.Name != "Fixture" || result.Symbol != "000042" || result.Exchange != "SZSE" {
+			t.Fatal("analysis task lost candidate identity")
+		}
+	}
 }
 
 type rejectModel struct{ calls int }

internal/integration/strategy_backtest_test.go

@@ -95,6 +95,10 @@ func testStrategyBacktest(t *testing.T, ctx context.Context, pool *pgxpool.Pool,
 	if e != nil || done.Status != "COMPLETED" || done.FinishedAt == nil || len(done.Result) == 0 {
 		t.Fatalf("completed job: %v", e)
 	}
+	listed, e := repo.List(ctx)
+	if e != nil || len(listed) != 1 || listed[0].Symbol != bi.Symbol || listed[0].Input != nil || listed[0].Result != nil {
+		t.Fatal("backtest list must retain the symbol without returning large inputs")
+	}
 	if _, e := pool.Exec(ctx, `UPDATE veyra_backtest_run SET result='{}'::jsonb WHERE id=$1`, job.ID); e == nil {
 		t.Fatal("completed result can be overwritten")
 	}