v0.4.6

Adds gridded ECAPE diagnostics and updates the ECAPE backend to ecape-rs v0.1.1.\n\nHighlights:\n- new grid ECAPE outputs for mapping workflows\n- Python API exposure for ECAPE-family diagnostics\n- direct ecape-rs backend update for improved parity with ecape-parcel\n\nVerification:\n- cargo test --manifest-path crates/metrust/Cargo.toml passed\n- python -m pytest tests/test_python_compat.py -q passed\n