Release v0.1.5

Changes

• chore: bump version to v0.1.5
• feat(sdk)!: Parameter is generic over value type V — value/valid_values-keys/default_value share V and are pythonic (not bytes); drop encode/decode byte machinery; coerce valid_values keys by data_type
• feat(sdk): add controller_did_emit_notification + Notification
• feat(sdk): add Device.description + Parameter.description (mfr, read-only) and Parameter.note (user-editable)
• fix(sdk): can_be_main_parameter requires user visibility
• chore(deps-ci): bump actions/download-artifact (#1)