More options for AUTOMATIC1111

This commit adds 3 new options to the AUTOMATIC1111 settings:
- CFG Scale
- Sampler
- Scheduler

These options allow users to configure these parameters directly through the admin settings, without needing to modify the source code, which was previously required to change the default values in  AUTOMATIC1111.

Signed-off-by: Balazs Toldi <balazs@toldi.eu>

backend/open_webui/config.py

@@ -1267,6 +1267,24 @@ AUTOMATIC1111_API_AUTH = PersistentConfig(
     os.getenv("AUTOMATIC1111_API_AUTH", ""),
 )
 
+AUTOMATIC1111_CFG_SCALE = PersistentConfig(
+    "AUTOMATIC1111_CFG_SCALE",
+    "image_generation.automatic1111.cfg_scale",
+    float(os.getenv("AUTOMATIC1111_CFG_SCALE", 7.0)),
+)
+
+AUTOMATIC1111_SAMPLER = PersistentConfig(
+    "AUTOMATIC1111_SAMPLERE",
+    "image_generation.automatic1111.sampler",
+    os.getenv("AUTOMATIC1111_SAMPLER", "Euler"),
+)
+
+AUTOMATIC1111_SCHEDULER = PersistentConfig(
+    "AUTOMATIC1111_SCHEDULER",
+    "image_generation.automatic1111.scheduler",
+    os.getenv("AUTOMATIC1111_SCHEDULER", "Automatic"),
+)
+
 COMFYUI_BASE_URL = PersistentConfig(
     "COMFYUI_BASE_URL",
     "image_generation.comfyui.base_url",