improve serialization for workflow interrupt

Author: ilvalerione

src/Workflow/Persistence/DatabasePersistence.php

@@ -30,7 +30,9 @@ public function save(string $workflowId, WorkflowInterrupt $interrupt): void
 
         $stmt->execute([
             'id' => $workflowId,
-            'interrupt' => serialize($interrupt),
+            'interrupt' => base64_encode(
+                serialize($interrupt)
+            ), // Simple Base64 string is compatible with all databases
         ]);
     }
 

src/Workflow/Persistence/EloquentPersistence.php

@@ -29,7 +29,7 @@ public function save(string $workflowId, WorkflowInterrupt $interrupt): void
         ], [
             'interrupt' => base64_encode(
                 serialize($interrupt)
-            ), // Base64 is better suited for some database types (like CockroachDB)
+            ), // Simple Base64 string is compatible with all databases
         ]);
     }