Fix Python version compatibility for Hugging Face Spaces

- Update requires-python to '>=3.10,<3.12' to match mussel dependency
- Change .python-version to 3.11 (within compatible range)
- Resolves 'Package mussel requires a different Python' error

.python-version

@@ -1 +1 @@
-3.10
+3.11

pyproject.toml

@@ -7,7 +7,7 @@ name = "mosaic"
 version = "0.1.0"
 description = "Mussel-Aeon-Paladin workflow for digital pathology"
 readme = "README.md"
-requires-python = ">=3.10"
+requires-python = ">=3.10,<3.12"
 dependencies = [
   "gradio>=5.49.0",
   "lightning>=2.6.0",