Q-RAG: Long Context Multi‑Step Retrieval via Value‑Based Embedder Training - Sorokin, Artyom; Buzun, Nazar; Anokhin, Aleksandr; VEDERNIKOV, Egor; Anokhin, Petr; Burtsev, Mikhail; Burnaev, Evgeny (International Conference on Learning Representations, 2026)