test(inspect): import unittest one way in the inspection suites

Code scanning flagged the mixed 'import unittest' and 'from unittest import
mock' forms. Use 'import unittest' plus 'import unittest.mock' everywhere.

tests/test_inspection_legacy_ports.py

@@ -10,6 +10,7 @@ import io
 import json
 import tempfile
 import unittest
+import unittest.mock
 import zlib
 from pathlib import Path
 
@@ -210,12 +211,11 @@ class TestOverwrittenPromptManagerText(unittest.TestCase):
 
     def test_the_workflow_is_parsed_only_for_prompt_manager_graphs(self):
         # Review M-4: no PromptManager-like node, no workflow parse.
-        from unittest import mock
 
         from utils import prompt_inspector
 
         prompt = parity.build("f02")["prompt"]
-        with mock.patch.object(
+        with unittest.mock.patch.object(
             prompt_inspector,
             "_parsed_workflow",
             wraps=prompt_inspector._parsed_workflow,

tests/test_inspection_outcomes.py

@@ -3,9 +3,9 @@
 import ast
 import json
 import unittest
+import unittest.mock
 from pathlib import Path
 from dataclasses import replace
-from unittest import mock
 
 from utils import prompt_pair_resolver
 from utils.inspection_outcomes import (
@@ -235,7 +235,7 @@ class TestOutcomeMessages(unittest.TestCase):
             "reason_code": None,
             "node": None,
         }
-        with mock.patch(
+        with unittest.mock.patch(
             "utils.prompt_inspector.resolve_prompt_pair", return_value=resolved
         ):
             evidence = inspect_prompt_evidence({"prompt": {}})

tests/test_inspection_semantics.py

@@ -9,9 +9,9 @@ import copy
 import json
 import tempfile
 import unittest
+import unittest.mock
 from pathlib import Path
 from types import MappingProxyType
-from unittest import mock
 
 from utils import inspection_semantics as semantics
 from utils.inspection_semantics import SemanticsError, load_semantics
@@ -700,7 +700,9 @@ class ValidationTest(_TableCase):
                 self.assertIn("nest", str(caught.exception))
         self.assertGreater(semantics.MAX_NESTING, _depth(json.loads(TABLE.read_text())))
         # Whichever interpreter limit the parser hits, it is a SemanticsError.
-        with mock.patch.object(semantics.json, "loads", side_effect=RecursionError):
+        with unittest.mock.patch.object(
+            semantics.json, "loads", side_effect=RecursionError
+        ):
             with self.assertRaises(SemanticsError) as caught:
                 self.load_doc(_minimal())
         self.assertIn("nests deeper", str(caught.exception))