feat: add image metadata loader with native LoRA Manager integration

Add Load Image Metadata (LoraManager) to extract reusable prompts,
model references, LoRA stacks, and sampling settings from images.

Prefer saved A1111-style parameters by default, with optional workflow
and subgraph sampler selection. Resolve local model and LoRA names,
report missing resources, and recover extraction failures with explicit
defaults and readable diagnostics.

Include parser, resource-resolution, and node regression tests, plus
usage documentation.

__init__.py

@@ -18,6 +18,7 @@ try:  # pragma: no cover - import fallback for pytest collection
     from .py.nodes.lora_info import LoraInfoLM
     from .py.nodes.lora_syntax_to_path import LoraSyntaxToPath
     from .py.nodes.create_hook_lora import CreateHookLoraLM
+    from .py.nodes.load_image_metadata import LoadImageMetadataLM
     from .py.nodes.metadata_overwrite import MetadataOverwriteLM
     from .py.metadata_collector import init as init_metadata_collector
 except (
@@ -70,6 +71,7 @@ except (
     MetadataOverwriteLM = importlib.import_module(
         "py.nodes.metadata_overwrite"
     ).MetadataOverwriteLM
+    LoadImageMetadataLM = importlib.import_module("py.nodes.load_image_metadata").LoadImageMetadataLM
     init_metadata_collector = importlib.import_module("py.metadata_collector").init
 
 NODE_CLASS_MAPPINGS = {
@@ -93,6 +95,7 @@ NODE_CLASS_MAPPINGS = {
     LoraSyntaxToPath.NAME: LoraSyntaxToPath,
     CreateHookLoraLM.NAME: CreateHookLoraLM,
     MetadataOverwriteLM.NAME: MetadataOverwriteLM,
+    LoadImageMetadataLM.NAME: LoadImageMetadataLM,
 }
 
 WEB_DIRECTORY = "./web/comfyui"