fix: resolve CI import and type mismatch issues

tests/test_models.py

@@ -0,0 +1,44 @@
+"""Tests for core models."""
+
+import pytest
+
+from src.core.models import Issue, IssueCategory, ScanResult, SeverityLevel
+
+
+class TestModels:
+    """Tests for data models."""
+
+    def test_issue_creation(self):
+        """Test Issue dataclass creation."""
+        issue = Issue(
+            category=IssueCategory.SECURITY,
+            severity=SeverityLevel.HIGH,
+            file_path="test.py",
+            line_number=10,
+            message="Security issue found",
+        )
+        assert issue.category == IssueCategory.SECURITY
+        assert issue.severity == SeverityLevel.HIGH
+        assert issue.file_path == "test.py"
+        assert issue.line_number == 10
+        assert issue.message == "Security issue found"
+
+    def test_scan_result_creation(self):
+        """Test ScanResult dataclass creation."""
+        result = ScanResult(
+            issues=[],
+            warnings=[],
+            files_scanned=5,
+            scan_time=1.5,
+        )
+        assert result.issues == []
+        assert result.warnings == []
+        assert result.files_scanned == 5
+        assert result.scan_time == 1.5
+
+    def test_severity_level_ordering(self):
+        """Test SeverityLevel enum values."""
+        assert SeverityLevel.LOW.value == "low"
+        assert SeverityLevel.MEDIUM.value == "medium"
+        assert SeverityLevel.HIGH.value == "high"
+        assert SeverityLevel.CRITICAL.value == "critical"