🧪 [testing improvement] Add error test for parse_command_arguments

This change adds comprehensive unit tests for the `parse_command_arguments` function in `src/enapter/cli/http/api/command_arguments.py`.

🎯 **What:** The testing gap addressed was the lack of validation for the JSON decoding error path.
📊 **Coverage:** The new tests cover:
- Passing `None` (returns empty dict)
- Passing valid JSON (returns parsed dict)
- Passing invalid JSON (raises `argparse.ArgumentTypeError`)
✨ **Result:** Improved reliability and code coverage for CLI argument parsing.

Co-authored-by: rnovatorov <20299819+rnovatorov@users.noreply.github.com>

Author: google-labs-jules[bot]

tests/unit/test_cli/__init__.py

@@ -0,0 +1,14 @@
+import argparse
+import pytest
+from enapter.cli.http.api.command_arguments import parse_command_arguments
+
+def test_parse_command_arguments_none():
+    assert parse_command_arguments(None) == {}
+
+def test_parse_command_arguments_valid_json():
+    assert parse_command_arguments('{"foo": "bar", "baz": 1}') == {"foo": "bar", "baz": 1}
+
+def test_parse_command_arguments_invalid_json():
+    with pytest.raises(argparse.ArgumentTypeError) as excinfo:
+        parse_command_arguments('invalid json')
+    assert "Decode JSON:" in str(excinfo.value)