feat: implement async database session management and CBSL currency exchange rate service with persistent caching

Update README to document simplified daily rates list subscription architecture

docs: update README with deployment optimizations, safeguards, and diagnostics

feat: implement key-less FX service with native CBSL web scraping and fallback cache logic

feat: implement FX service with persistent caching and optimize concurrent rate fetching in main

fix: correct SQL filter syntax in main.py and document Hugging Face deployment networking and database configurations in README.md

feat: implement aiogram command handlers and interactive currency keyboards for Telegram bot

Implement premium real-time glassmorphic dashboard served directly on root

Add Hugging Face configuration to README

Update README.md and fix encoding

first commit