fix: stabilize macOS deadline regression checks

tests/test_macos_storage_protection.py

@@ -461,18 +461,20 @@ def test_application_metadata_tools_share_total_budget(project_root, tmp_path):
         plist_tool,
         mdls_tool,
         extra_env={
-            "PCH_STORAGE_APPLICATION_COMMAND_TIMEOUT": "5",
+            "PCH_STORAGE_APPLICATION_COMMAND_TIMEOUT": "10",
             # Bash SECONDS has whole-second resolution. A one-second budget
             # can expire during fixture validation before the tool launches.
             # Two seconds gives startup headroom while still proving that the
-            # shared budget cuts short the five-second command timeout.
+            # shared budget cuts short the ten-second command timeout.
             "PCH_STORAGE_APPLICATION_TOTAL_BUDGET": "2",
         },
     )
     elapsed = time.monotonic() - started
 
     assert result.returncode == 0, result.stderr
-    assert elapsed < 4
+    # Leave scheduling headroom on shared macOS runners while remaining
+    # below the per-command timeout (10s) and hanging child lifetime (30s).
+    assert elapsed < 8
     assert child_pid.exists(), "the tool must launch to exercise budget cancellation"
     pid = child_pid.read_text(encoding="utf-8")
     assert not subprocess.run(

tests/test_macos_watch.py

@@ -1866,7 +1866,9 @@ def test_storage_watch_notification_deadline_stops_the_entire_process_tree(
     # Measure the notification deadline from notifier startup. The outer
     # command also verifies the signed app and collects storage facts, which
     # can take several seconds on a shared CI host before notification begins.
-    assert time.time() - child_pid_file.stat().st_mtime < 4
+    # The 1s polling deadline also includes process reaping and state writes.
+    # Keep the bound below the 20s child lifetime without timing CI load.
+    assert time.time() - child_pid_file.stat().st_mtime < 8
     child_pid = int(child_pid_file.read_text(encoding="utf-8").strip())
     for _ in range(50):
         try: