refactor(tests): Add strict type hints to fourth batch of test files

tests/test_log_pruner.py

@@ -1,3 +1,4 @@
+from typing import Tuple
 import os
 import shutil
 import pytest
@@ -7,7 +8,7 @@ from log_registry import LogRegistry
 from log_pruner import LogPruner
 
 @pytest.fixture
-def pruner_setup(tmp_path):
+def pruner_setup(tmp_path: Path) -> Tuple[LogPruner, LogRegistry, Path]:
  logs_dir = tmp_path / "logs"
  logs_dir.mkdir()
  registry_path = logs_dir / "log_registry.toml"
@@ -15,7 +16,7 @@ def pruner_setup(tmp_path):
  pruner = LogPruner(registry, str(logs_dir))
  return pruner, registry, logs_dir
 
-def test_prune_old_insignificant_logs(pruner_setup):
+def test_prune_old_insignificant_logs(pruner_setup: Tuple[LogPruner, LogRegistry, Path]) -> None:
  pruner, registry, logs_dir = pruner_setup
  # 1. Old and small (insignificant) -> should be pruned
  session_id_old_small = "old_small"