### Fixed
- Gateway voice, TTS, STT, and vision catalog routes now use the AbstractCore capability abstractions as the source of truth for provider and provider-model discovery.
- Direct Gateway TTS and STT routes now dispatch through the AbstractCore capability registry, preserving explicitly selected media providers and models through execution.
- Gateway LLM provider/model discovery can proxy configured AbstractCore Server catalog routes while keeping Flow's existing response contract.

### Changed
- Raised dependency floors to Runtime `>=0.4.12`, Core `>=2.13.15`, Flow `>=0.3.11`, Vision `>=0.3.6`, and Voice `>=0.10.3`.
