Add comprehensive test suite achieving 99% code coverage

Added 35 test files with 502 tests covering all Python modules including
API routes, ORM models, splendor game logic/TUI, heater controller,
weather service, NixOS installer, ZFS dataset management, and utilities.
Coverage improved from 11% to 99% (2540/2564 statements covered).

https://claude.ai/code/session_01SVzgLDUS1Cdc4eh1ijETTh

tests/test_testing_logging.py

@@ -0,0 +1,38 @@
+"""Tests for python/testing/logging modules."""
+
+from __future__ import annotations
+
+from python.testing.logging.bar import bar
+from python.testing.logging.configure_logger import configure_logger
+from python.testing.logging.foo import foo
+from python.testing.logging.main import main
+
+
+def test_bar() -> None:
+    """Test bar function."""
+    bar()
+
+
+def test_configure_logger_default() -> None:
+    """Test configure_logger with default level."""
+    configure_logger()
+
+
+def test_configure_logger_debug() -> None:
+    """Test configure_logger with debug level."""
+    configure_logger("DEBUG")
+
+
+def test_configure_logger_with_test() -> None:
+    """Test configure_logger with test name."""
+    configure_logger("INFO", "TEST")
+
+
+def test_foo() -> None:
+    """Test foo function."""
+    foo()
+
+
+def test_main() -> None:
+    """Test main function."""
+    main()