Improve search: pymorphy3 stemming, top_k=4, RRF 0.3/0.7, restructured KB

Revert "fix: add bot logging, suppress transformers progress bars"

fix: add bot logging, suppress transformers progress bars

feat: search_debug(), RAG details in web logs

hybrid search (bge-m3 + BM25 + RRF) + local Llama 3.2 3B fallback

feat: split KB into general + insoles, add operator triggers

add title boost for better search relevance

add Russian stemming for better search

initial: ORTOS Telegram Bot v2