feat(api): add detailer postprocess script and /sdapi/v1/detail endpoint

Surface YoloRestorer.restore() as a standalone operation: a Detailer
postprocessing script in the Process tab and a thin /sdapi/v1/detail
endpoint, neither requiring a base generation pass.

- modules/postprocess/yolo.py: YoloRestorer.make_processing() builds the
  synthetic Img2Img processing object both entry points feed to restore(),
  resolving the seed so the inpaint passes are reproducible
- modules/api/process.py: post_detail handler exposes the full detailer
  parameter set and returns the detailed image plus optional annotations
  as base64
- scripts/postprocessing_detailer.py: reuses shared.yolo.ui('extras') and
  runs through make_processing()
- modules/postprocessing.py: run_extras takes a per-script script_args
  dict, also letting the extras API drive other scripts such as Remove
  background; omitting it leaves existing callers unchanged
- modules/api/models.py: ReqDetail / ResDetail
- modules/processing_info.py: guard create_infotext's Image/Hires CFG
  reporting against an unset (None) cfg_image, matching the is-not-None
  checks the other cfg_image readers use; the detailer inpaint pass runs
  with it unset
- test/test-detailer-api.py: covers both paths; effect tests measure the
  diff inside the detected region with extreme isolated parameter values,
  and the suite disables model quantization for the run and restores the
  original settings afterward

modules/postprocessing.py

@@ -100,10 +100,10 @@ def run_postprocessing(extras_mode, image, image_folder: list[tempfile.NamedTemp
     return outputs, info, params
 
 
-def run_extras(extras_mode, resize_mode, image, image_folder, input_dir, output_dir, show_extras_results, upscaling_resize, upscaling_resize_w, upscaling_resize_h, upscaling_crop, extras_upscaler_1, extras_upscaler_2, extras_upscaler_2_visibility, save_output: bool = True):
+def run_extras(extras_mode, resize_mode, image, image_folder, input_dir, output_dir, show_extras_results, upscaling_resize, upscaling_resize_w, upscaling_resize_h, upscaling_crop, extras_upscaler_1, extras_upscaler_2, extras_upscaler_2_visibility, save_output: bool = True, script_args: dict | None = None):
     """old handler for API"""
 
-    args = scripts_manager.scripts_postproc.create_args_for_run({
+    merged = {
         "Upscale": {
             "upscale_mode": resize_mode,
             "upscale_by": upscaling_resize,
@@ -114,6 +114,10 @@ def run_extras(extras_mode, resize_mode, image, image_folder, input_dir, output_
             "upscaler_2_name": extras_upscaler_2,
             "upscaler_2_visibility": extras_upscaler_2_visibility,
         },
-    })
+    }
+    if script_args:
+        for name, kvs in script_args.items():
+            merged.setdefault(name, {}).update(kvs or {})
+    args = scripts_manager.scripts_postproc.create_args_for_run(merged)
 
     return run_postprocessing(extras_mode, image, image_folder, input_dir, output_dir, show_extras_results, *args, save_output=save_output)