Changelog

Added structural IPA comparison diagnostics with stress-aware classifications and a profile-aware diff CLI

Added the feature-align/1 IPA pronunciation distance API and CLI

Added PanPhon-backed articulatory feature comparison with explicit metric and backend provenance

Added the bundled Standard German de-DE profile and language-specific sequence equivalences

Changed alignment output to support score-only and explainable deterministic operation traces

Fixed IPA normalization, unsupported-segment validation, and release provenance

Documented metric limitations, profile semantics, and release publishing requirements