chore(blender): update prerequisites and enforce absolute paths in skill docs

As requested by reviewers:
- Updated registry.json to specify Blender >= 4.2.
- Updated SKILL.md to require absolute paths from agents for better background resilience.

blender/agent-harness/cli_anything/blender/skills/SKILL.md

@@ -19,7 +19,7 @@ pip install cli-anything-blender
 
 **Prerequisites:**
 - Python 3.10+
-- blender must be installed on your system
+- blender (>= 4.2) must be installed on your system
 
 
 ## Usage
@@ -228,7 +228,7 @@ When using this CLI programmatically:
 1. **Always use `--json` flag** for parseable output
 2. **Check return codes** - 0 for success, non-zero for errors
 3. **Parse stderr** for error messages on failure
-4. **Use absolute paths** for all file operations
+4. **MANDATORY: Use absolute paths** for all file operations (rendering, project files). Relative paths are prone to failure in background execution.
 5. **Verify outputs exist** after export operations
 
 ## More Information

registry.json

@@ -52,7 +52,7 @@
       "display_name": "Blender",
       "version": "1.0.0",
       "description": "3D modeling, animation, and rendering via blender --background --python",
-      "requires": "blender",
+      "requires": "blender >= 4.2",
       "homepage": "https://www.blender.org",
       "install_cmd": "pip install git+https://github.com/HKUDS/CLI-Anything.git#subdirectory=blender/agent-harness",
       "entry_point": "cli-anything-blender",