feat: Implement upscale functionality with ONNX models

- Added upscale operator to handle image upscaling by 4x using AI models.
- Introduced new jobs for upscale processing in the server, including debug and standard upscale jobs.
- Created a new ONNX model handler for upscale operations, supporting tiled inference and resource management.
- Updated tests to cover new upscale functionality, including input validation and output verification.
- Added documentation for the upscale feature, detailing usage and model options.

src/anyimage/server/app.py

@@ -0,0 +1,92 @@
+"""AnyImage Job Server without Blender dependencies."""
+
+from blendjob import JobServer
+
+from .jobs import generate_depth as _generate_depth
+from .jobs import generate_surface as _generate_surface
+from .jobs.background import run as _remove_background
+from .jobs.balloon import run as _analyze_balloon
+from .jobs.debug_ben2 import run as _debug_ben2
+from .jobs.debug_da3 import run as _debug_da3
+from .jobs.debug_moge2 import run as _debug_moge2
+from .jobs.debug_upscale import run as _debug_upscale
+from .jobs.frames import run as _extract_frames
+from .jobs.image_mask import run as _refine_image_mask
+from .jobs.upscale import run as _upscale_image
+from .model_manager import ModelManager
+
+
+server = JobServer("AnyImage Job Server")
+
+
+@server.resource("model_manager")
+def create_model_manager(job_server):
+    return ModelManager(job_server.storage_root / "models")
+
+
+@server.job("download-model")
+def download_model(context, parameters):
+    manager = context.resource("model_manager")
+    return manager.download(context, parameters["model"])
+
+
+@server.job("download-required-models")
+def download_required_models(context, parameters):
+    manager = context.resource("model_manager")
+    return manager.download_missing(context, parameters["models"])
+
+
+@server.job("analyze-balloon")
+def analyze_balloon(context, parameters):
+    return _analyze_balloon(context, parameters)
+
+
+@server.job("refine-image-mask")
+def refine_image_mask(context, parameters):
+    return _refine_image_mask(context, parameters)
+
+
+@server.job("remove-background")
+def remove_background(context, parameters):
+    return _remove_background(context, parameters)
+
+
+@server.job("upscale-image")
+def upscale_image(context, parameters):
+    return _upscale_image(context, parameters)
+
+
+@server.job("extract-frames")
+def extract_frames(context, parameters):
+    return _extract_frames(context, parameters)
+
+
+@server.job("generate-depth")
+def generate_depth(context, parameters):
+    return _generate_depth(context, parameters)
+
+
+@server.job("generate-surface")
+def generate_surface(context, parameters):
+    return _generate_surface(context, parameters)
+
+
+@server.job("debug-da3")
+def debug_da3(context, parameters):
+    return _debug_da3(context, parameters)
+
+
+@server.job("debug-moge2")
+def debug_moge2(context, parameters):
+    return _debug_moge2(context, parameters)
+
+
+@server.job("debug-ben2")
+def debug_ben2(context, parameters):
+    return _debug_ben2(context, parameters)
+
+
+@server.job("debug-upscale")
+def debug_upscale(context, parameters):
+    return _debug_upscale(context, parameters)
+