fix: Ensure all crawl tasks use method='http' transport

- product_discovery → product_refresh now sets method: 'http'
- product_refresh → entry_point_discovery now sets method: 'http'
- All crawl tasks now require HTTP preflight to claim

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/src/tasks/handlers/product-discovery-http.ts

@@ -344,6 +344,7 @@ export async function handleProductDiscoveryHttp(ctx: TaskContext): Promise<Task
       role: 'product_refresh',
       dispensary_id: dispensaryId,
       priority: task.priority || 0,
+      method: 'http', // Browser-only transport
       payload: { payload_id: payloadResult.id },
     });
 

backend/src/tasks/handlers/product-refresh.ts

@@ -113,6 +113,7 @@ export async function handleProductRefresh(ctx: TaskContext): Promise<TaskResult
             role: 'entry_point_discovery',
             dispensary_id: dispensaryId,
             priority: task.priority || 0,
+            method: 'http', // Browser-only transport
           });
           return {
             success: true,