Pin Ruff lint rule selection to stable defaults

Co-authored-by: leestott <2511341+leestott@users.noreply.github.com>

Author: Copilot

pyproject.toml

@@ -36,6 +36,9 @@ foundry = [
 line-length = 100
 target-version = "py39"
 
+[tool.ruff.lint]
+select = ["E4", "E7", "E9", "F"]
+
 [tool.ruff.lint.per-file-ignores]
 # Entry scripts must manipulate sys.path before importing the src package.
 "scripts/*.py" = ["E402"]