fix: 补齐 rows.Err() 检查（R-2，其余包）

覆盖 kb/storage/projectworkflow/docgov/freedoc 与两个 document CLI。

Co-authored-by: Cursor <cursoragent@cursor.com>

cmd/document-content-reconcile/main.go

@@ -111,6 +111,10 @@ func main() {
 			os.Exit(1)
 		}
 	}
+	if err := rows.Err(); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
 	enc, _ := json.MarshalIndent(report, "", "  ")
 	if *outPath != "" {
 		_ = os.WriteFile(*outPath, enc, 0o644)

cmd/document-revision-backfill/main.go

@@ -116,6 +116,10 @@ func main() {
 		report.Success++
 		report.Items = append(report.Items, it)
 	}
+	if err := rows.Err(); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
 	enc, _ := json.MarshalIndent(report, "", "  ")
 	if *outPath != "" {
 		_ = os.WriteFile(*outPath, enc, 0o644)