run_cli test helper uses hardcoded "python" — FileNotFoundError on python3-only systems

[rsleedbx]

Bug

tests/fixtures/utils.py calls the sqlit CLI using a hardcoded "python" binary:

cmd = ["python", "-m", "sqlit.cli"] + list(args)

On macOS and most Linux distros only python3 is in PATH; python is not available. This causes test_create_*_connection tests to fail with:

FileNotFoundError: [Errno 2] No such file or directory: 'python'

Fix

Replace the hardcoded "python" with sys.executable, which always refers to the exact interpreter that is running the test suite — regardless of what is or isn't in PATH:

import sys
cmd = [sys.executable, "-m", "sqlit.cli"] + list(args)

This is the standard pattern recommended by the Python docs for launching subprocesses using the current interpreter.

Affected tests

Any test that calls run_cli() to create/delete connections — e.g. test_create_*_connection, test_connection_list, etc.

Reproduced on: macOS 15, Python 3.10 (via venv), python not in PATH.