Implement Balloon Depth Sampling and Validation Tools

- Added depth.py for MoGe-2 depth sampling and balloon deformation functionality.
- Introduced validate_balloon_asset.py to validate balloon shape modifiers and material properties in Blender.
- Enhanced test_server.py with new unit tests for balloon depth analysis and job progress tracking.
- Updated existing tests to improve code clarity and maintainability.

src/snapform/server/__init__.py

@@ -5,7 +5,7 @@ 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 _refine_balloon
+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
@@ -33,9 +33,9 @@ def download_required_models(context, parameters):
     return manager.download_missing(context, parameters["models"])
 
 
-@server.job("refine-balloon")
-def refine_balloon(context, parameters):
-    return _refine_balloon(context, parameters)
+@server.job("analyze-balloon")
+def analyze_balloon(context, parameters):
+    return _analyze_balloon(context, parameters)
 
 
 @server.job("remove-background")