Backport: telemetry workflow_opened with open_source and missing node metrics (#6476) (#6497)

Backport of #6476 onto rh-test.

- Adds telemetry events for `workflow_opened` and `workflow_imported`
including `open_source` and missing node metrics.
- Resolves merge conflict in `src/scripts/app.ts` by keeping the
telemetry block after `afterConfigureGraph`.
- Includes template load and file input changes to pass `openSource`.

Files changed:
- src/platform/telemetry/providers/cloud/MixpanelTelemetryProvider.ts
- src/platform/telemetry/types.ts
- src/platform/workflow/templates/composables/useTemplateWorkflows.ts
- src/scripts/app.ts
- src/scripts/ui.ts

Validated with `pnpm lint:fix` and `pnpm typecheck`.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6497-Backport-telemetry-workflow_opened-with-open_source-and-missing-node-metrics-6476-29e6d73d365081238b8cef1d1a44287f)
by [Unito](https://www.unito.io)

Co-authored-by: bymyself <cbyrne@comfy.org>

src/platform/telemetry/providers/cloud/MixpanelTelemetryProvider.ts

@@ -371,6 +371,10 @@ export class MixpanelTelemetryProvider implements TelemetryProvider {
     this.trackEvent(TelemetryEvents.WORKFLOW_IMPORTED, metadata)
   }
 
+  trackWorkflowOpened(metadata: WorkflowImportMetadata): void {
+    this.trackEvent(TelemetryEvents.WORKFLOW_OPENED, metadata)
+  }
+
   trackPageVisibilityChanged(metadata: PageVisibilityMetadata): void {
     this.trackEvent(TelemetryEvents.PAGE_VISIBILITY_CHANGED, metadata)
   }

src/platform/telemetry/types.ts

@@ -95,8 +95,22 @@ export interface TemplateMetadata {
 export interface WorkflowImportMetadata {
   missing_node_count: number
   missing_node_types: string[]
+  /**
+   * The source of the workflow open/import action
+   */
+  open_source?: 'file_button' | 'file_drop' | 'template' | 'unknown'
 }
 
+/**
+ * Workflow open metadata
+ */
+/**
+ * Enumerated sources for workflow open/import actions.
+ */
+export type WorkflowOpenSource = NonNullable<
+  WorkflowImportMetadata['open_source']
+>
+
 /**
  * Template library metadata
  */
@@ -181,6 +195,7 @@ export interface TelemetryProvider {
 
   // Workflow management events
   trackWorkflowImported(metadata: WorkflowImportMetadata): void
+  trackWorkflowOpened(metadata: WorkflowImportMetadata): void
 
   // Page visibility events
   trackPageVisibilityChanged(metadata: PageVisibilityMetadata): void
@@ -233,6 +248,7 @@ export const TelemetryEvents = {
 
   // Workflow Management
   WORKFLOW_IMPORTED: 'app:workflow_imported',
+  WORKFLOW_OPENED: 'app:workflow_opened',
 
   // Page Visibility
   PAGE_VISIBILITY_CHANGED: 'app:page_visibility_changed',

src/platform/workflow/templates/composables/useTemplateWorkflows.ts

@@ -138,7 +138,9 @@ export function useTemplateWorkflows() {
         }
 
         dialogStore.closeDialog()
-        await app.loadGraphData(json, true, true, workflowName)
+        await app.loadGraphData(json, true, true, workflowName, {
+          openSource: 'template'
+        })
 
         return true
       }
@@ -159,7 +161,9 @@ export function useTemplateWorkflows() {
       }
 
       dialogStore.closeDialog()
-      await app.loadGraphData(json, true, true, workflowName)
+      await app.loadGraphData(json, true, true, workflowName, {
+        openSource: 'template'
+      })
 
       return true
     } catch (error) {