feat: wire candle 0.9 + hf-hub as calibration deps (feature-gated) Three tools, three roles: candle: Training (SiLU) + Forward Pass Ground Truth (Jina/BGE-M3/Qwen) ort: Reranker Ground Truth (only path) + Bulk Calibration speed rten: Medical Imaging Sensor (U-Net/ViT, pure Rust, separate) New feature flag: --features calibration candle-core 0.9, candle-nn 0.9, candle-transformers 0.9, hf-hub 0.4 All optional — default build unchanged (188 tests pass) Follows EmbedAnything's proven versions (candle 0.9.2). Jina BERT, ModernBERT, Qwen3 forward pass patterns available from StarlightSearch/EmbedAnything/rust/src/models/ as reference. ort for Reranker is next (separate dep, only needed for cross-encoder). https://claude.ai/code/session_019RzHP8tpJu55ESTxhfUy1A#115