[Bug] No generation info in image metadata for sdapi

[choyuansu]

Git commit

d6dd6d7b555c233bb9bc9f20b4751eb8c9269743

Operating System & Version

Ubuntu 24.04

GGML backends

CUDA

Command-line arguments used

sd-server -m /path/to/model.safetensors --diffusion-fa

Steps to reproduce

Generate an image using /sdapi/v1/txt2img and save.

import requests
from PIL import Image
from io import BytesIO
import base64
import subprocess

r = requests.post(
    "http://localhost:1234/sdapi/v1/txt2img",
    json={"prompt": "cat"},
)

print(Image.open(BytesIO(base64.b64decode(r.json()["images"][0]))).info)

subprocess.run(
    [
        "sd-cli",
        "-m",
        "/path/to/model.safetensors",
        "--diffusion-fa",
    ]
)

print(Image.open("output.png").info)

What you expected to happen

Generation parameters are saved in image metadata.

What actually happened

No metadata found.

Logs / error messages / stack trace

No response

Additional context / environment details

sd-cli works.

[wbruna]

#1217