feat: implement transferWorkflow operation in n8n_update_partial_workflow (#644) (#649)

Add transferWorkflow diff operation to move workflows between n8n projects:
- TransferWorkflowOperation type with destinationProjectId field
- WorkflowDiffEngine validates and tracks transfer intent
- Handler calls PUT /workflows/{id}/transfer after update
- N8nApiClient.transferWorkflow() method
- Zod schema validates destinationProjectId is non-empty
- Tool description and documentation updated
- inferIntentFromOperations case for transfer

Also fixes two pre-existing bugs found during review:
- continueOnError path now properly extracts/propagates activation flags
- Debug log in updateConnectionReferences shows correct old name

Based on work by @djakielski in PR #645.


Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en

dist/services/n8n-api-client.js

@@ -194,6 +194,14 @@ class N8nApiClient {
             throw (0, n8n_errors_1.handleN8nApiError)(error);
         }
     }
+    async transferWorkflow(id, destinationProjectId) {
+        try {
+            await this.client.put(`/workflows/${id}/transfer`, { destinationProjectId });
+        }
+        catch (error) {
+            throw (0, n8n_errors_1.handleN8nApiError)(error);
+        }
+    }
     async activateWorkflow(id) {
         try {
             const response = await this.client.post(`/workflows/${id}/activate`, {});