Strengthen determinism gates and add TUI v2 agent testing workflow

src/tests/test_ssh_entry.py

@@ -1,6 +1,7 @@
 import sys
 from pathlib import Path
 from tempfile import TemporaryDirectory
+import pytest
 
 from helpers import create_vault, TEST_SEED, TEST_PASSWORD
 
@@ -11,6 +12,8 @@ from seedpass.core.backup import BackupManager
 from seedpass.core.vault import Vault
 from seedpass.core.config_manager import ConfigManager
 
+pytestmark = pytest.mark.determinism
+
 
 def test_add_and_retrieve_ssh_key_pair():
     with TemporaryDirectory() as tmpdir: