AbstractCore v2.13.28

Changed

• Capability plugin floors: updated optional capability plugin install floors to abstractvoice>=0.10.16 and abstractvision>=0.3.14 so Core installs consume the latest OmniVoice catalog and MLX-Gen vision surfaces.
• Capability defaults: added shared capability default configuration support for server and downstream hosts.
• Embedding configuration: expanded remote embedding provider configuration and server routing coverage.

Fixed

• Vision catalog propagation: preserved AbstractVision's canonical mlx-gen q4/q8 model catalog through Core discovery without hardcoded provider fallbacks.