Polish: Auto-add https scheme if missing

api.py

@@ -214,6 +214,10 @@ def start_scan(
             content={"error": "Must provide either JSON body or query parameters (domain required)"}
         )
     
+    # Ensure domain has scheme
+    if target_domain and not target_domain.startswith(('http://', 'https://')):
+        target_domain = f"https://{target_domain}"
+    
     job_id = str(uuid4())
     JOBS[job_id] = {
         "status": "pending",