Fix syntax error - remove orphaned except block and fix indentation

- Remove orphaned 'except Exception as e:' block that had no matching try
- Fix indentation for wan scheduler configuration
- Change 'I2V model loaded' to generic 'Model loaded' message

videogen

@@ -8790,12 +8790,8 @@ def main(args):
                 except:
                     pass
             
-                print(f"  ✅ I2V model loaded successfully")
-                timing.end_step()  # i2v_model_loading
-                
-            except Exception as e:
-                print(f"❌ Failed to load I2V model: {e}")
-                sys.exit(1)
+            print(f"  ✅ Model loaded successfully")
+            timing.end_step()  # model_loading
 
     # ─── Audio Generation (Pre-video) ──────────────────────────────────────────
     audio_path = None