chore(release): bump version to v0.7.1

[slomin]

Version bump for v0.7.1 release.

Test evidence:

• uv run python -m pytest tests/unit tests/api -q -n auto: 582 passed
• npx playwright test --reporter=dot --timeout=15000 --workers=75%: 118 passed
• uv run python -m pytest tests/unit/test_version.py tests/unit/test_ota_release.py tests/api/test_status.py tests/api/test_update.py -q: 63 passed