Add workflow filters on diagram (#12974)

> [!NOTE]
> The new behavior is hidden behind a feature flag. 

## Before


https://github.com/user-attachments/assets/30c6d001-d9c8-4006-b577-e4e450d58b12

## After


https://github.com/user-attachments/assets/79446976-4508-41d2-8044-4078f67c02e0

packages/twenty-server/src/engine/core-modules/feature-flag/enums/feature-flag-key.enum.ts

@@ -6,4 +6,5 @@ export enum FeatureFlagKey {
   IS_JSON_FILTER_ENABLED = 'IS_JSON_FILTER_ENABLED',
   IS_AI_ENABLED = 'IS_AI_ENABLED',
   IS_IMAP_ENABLED = 'IS_IMAP_ENABLED',
+  IS_WORKFLOW_FILTERING_ENABLED = 'IS_WORKFLOW_FILTERING_ENABLED',
 }

packages/twenty-server/src/engine/core-modules/feature-flag/validates/feature-flag.validate.spec.ts

@@ -12,6 +12,15 @@ describe('featureFlagValidator', () => {
       ).not.toThrow();
     });
 
+    it('should not throw error for new workflow filtering feature flag', () => {
+      expect(() =>
+        featureFlagValidator.assertIsFeatureFlagKey(
+          'IS_WORKFLOW_FILTERING_ENABLED',
+          new CustomException('Error', 'Error'),
+        ),
+      ).not.toThrow();
+    });
+
     it('should throw error if featureFlagKey is invalid', () => {
       const invalidKey = 'InvalidKey';
       const exception = new CustomException('Error', 'Error');

packages/twenty-server/src/engine/workspace-manager/dev-seeder/core/utils/seed-feature-flags.util.ts

@@ -40,6 +40,11 @@ export const seedFeatureFlags = async (
         workspaceId: workspaceId,
         value: true,
       },
+      {
+        key: FeatureFlagKey.IS_WORKFLOW_FILTERING_ENABLED,
+        workspaceId: workspaceId,
+        value: false,
+      },
       {
         key: FeatureFlagKey.IS_IMAP_ENABLED,
         workspaceId: workspaceId,