v0.7.0a1

Added

• Programmable Pattern API (async body + declarative builder unified runtime)
• Unknown-mask waveform loading (load_unknown_mask, load_matched_unknown_masks)
• Pattern result status filters (filter_ok, filter_failed, filter_status)

Changed

• Unify declarative/programmable pattern runtime into single engine
• Remove legacy pattern engine and tick compatibility
• Simplify reader backend hook docstrings; mark unknown-mask API experimental
• Unify value-change loading across readers