test: add comprehensive tests across modules to increase coverage above 60%

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

tests/test_upload_email.py

@@ -0,0 +1,13 @@
+"""Tests for app/tasks/upload_to_email.py module."""
+import pytest
+from unittest.mock import patch, MagicMock
+
+
+@pytest.mark.unit
+class TestUploadToEmail:
+    """Tests for upload_to_email task."""
+
+    def test_module_imports(self):
+        """Test that the module can be imported."""
+        from app.tasks.upload_to_email import upload_to_email
+        assert callable(upload_to_email)