feat: add row count mismatch error handling in processMigrationJob and update SQL query to exclude additional graph-related columns

cmd/go_migrate/process.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"fmt"
 	"sync"
 	"sync/atomic"
 	"time"
@@ -233,5 +234,9 @@ func processMigrationJob(
 	result.RowsLoaded = atomic.LoadInt64(&rowsLoaded)
 	result.RowsFailed = atomic.LoadInt64(&rowsFailed)
 
+	if result.RowsRead != result.RowsLoaded {
+		result.Error = fmt.Errorf("Row count mismatch: extracted %d rows but loaded %d rows (failed: %d)", result.RowsRead, result.RowsLoaded, result.RowsFailed)
+	}
+
 	return result
 }