移除 majicmixRealistic_v7 依赖，改用 v1-5-pruned-emaonly

- lora_train_service_1.py: 训练底模改为 v1-5-pruned-emaonly.safetensors
- gen_super_image.py: 注释掉 refiner_checkpoint（majicmix 不存在会导致推理报错）
- setup.sh: 检查项改为 v1-5-pruned-emaonly.safetensors
- README.md: 移除 majicmixRealistic_v7 下载步骤

photo_service/lora_train_service_1.py

@@ -309,7 +309,7 @@ def train_thread(sq, gpu_id):
                 f'-v {sd_models_dir}:/mnt/sd_models '
                 '-e PATH=/home/chinatszrn/.local/bin -w /home/chinatszrn/kohya_ss '
                 '--net=host chinatszrn/ubuntu:kohya_ss accelerate launch --num_cpu_threads_per_process=2 "./train_network.py" --enable_bucket '
-                '--min_bucket_reso=256 --max_bucket_reso=2048 --pretrained_model_name_or_path="/mnt/sd_models/majicmixRealistic_v7.safetensors" '
+                '--min_bucket_reso=256 --max_bucket_reso=2048 --pretrained_model_name_or_path="/mnt/sd_models/v1-5-pruned-emaonly.safetensors" '
                 f'--train_data_dir={container_images_dir} --resolution="2000,2000" '
                 f'--output_dir={container_model_dir} '
                 '--network_alpha="64" --save_model_as=safetensors --network_module=networks.lora --text_encoder_lr=5e-05 '