Fix Python setup in CI

README.md

@@ -158,7 +158,12 @@ still works without installing HA.
 
 `.gitea/workflows/tests.yml` runs the same checks for pushes and pull requests on
 the dedicated `bs-node` Actions runner label (`bs-node:docker://node:22-bookworm`). Repository Actions must be enabled.
-The runner must support checkout/setup-python and Python 3.13 dependencies. Dependencies and action downloads need internet access in CI;
+The runner must support the checkout and setup-uv actions. CI uses pinned uv
+0.9.6 to create a Python 3.13 virtual environment from standalone Python builds;
+`setup-python` cannot provision this version in the Debian Bookworm job image.
+The environment includes pip for the existing check script. Action caching is
+explicitly disabled to avoid requiring GitHub cache services on Gitea.
+Dependencies, Python builds and action downloads need internet access in CI;
 model inference does not. Remote CI execution has not yet been verified. Local
 validation used macOS and Python 3.13; Linux runner validation remains necessary.
 No runtime integration behavior or manifest version changed in this test commit.