v2 program: v2.1 multi-dataset variant, GGUF layer-trim early-exit (bit-exact), server-mode extractor, 5-task BEIR sweep, binary/int8 compression study, full ablation writeup

POG-E4B-v1: Matryoshka retrieval adapter on frozen Gemma-4 E4B QAT (layers 28/32/36 interception)