Implement credentialed live hardening workplan

tests/test_troubleshooting.py

@@ -0,0 +1,29 @@
+from phase_memory.troubleshooting import (
+    TROUBLESHOOTING_REQUIRED_CATEGORIES,
+    operator_troubleshooting_matrix,
+    validate_operator_troubleshooting_matrix,
+)
+
+
+def test_operator_troubleshooting_matrix_covers_required_categories() -> None:
+    matrix = operator_troubleshooting_matrix()
+    validation = validate_operator_troubleshooting_matrix(matrix)
+    categories = {row["category"] for row in matrix["rows"]}
+
+    assert set(TROUBLESHOOTING_REQUIRED_CATEGORIES) <= categories
+    assert validation["valid"] is True
+    assert validation["diagnostics"] == []
+
+
+def test_operator_troubleshooting_matrix_validation_reports_missing_fields() -> None:
+    matrix = {
+        "schema_version": "phase_memory.operator_troubleshooting.v1",
+        "rows": [{"category": "credentials", "diagnostic_code": "credential_env_missing"}],
+    }
+
+    validation = validate_operator_troubleshooting_matrix(matrix)
+    codes = {diagnostic["code"] for diagnostic in validation["diagnostics"]}
+
+    assert validation["valid"] is False
+    assert "troubleshooting_matrix_missing_category" in codes
+    assert "troubleshooting_matrix_missing_field" in codes