fix(python): standardize Python version across all packages

- Updated all `libs/python/*/pyproject.toml` files to require Python >=3.12
- Synchronized root `pyproject.toml` and regenerated `uv.lock`

libs/python/computer/pyproject.toml

@@ -18,7 +18,7 @@ dependencies = [
     "cua-core>=0.1.0,<0.2.0",
     "pydantic>=2.11.1"
 ]
-requires-python = ">=3.11"
+requires-python = ">=3.12"
 
 [project.optional-dependencies]
 lume = [