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

Update Telegram autocomplete command list registration on startup

Simplify Telegram Bot to unified daily rate list subscription and drop legacy tables

fix: remove delete_webhook from production shutdown to resolve zero-downtime race condition

feat: add production webhook safeguard for local development

feat: enhance diagnostic logs and webhook error handling

feat: add in-memory diagnostic logs endpoint to track production errors

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

diagnostics: include safe environment variables details

chore: handle startup db failures gracefully and add long polling fallback

security: Remove hardcoded telegram bot tokens from tracked source files

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

refactor: update Aiogram bot initialization to use AiohttpSession with custom API server

feat: add optional custom Telegram Bot API server proxy/mirror configuration

fix: update getaddrinfo monkeypatch to return both native Telegram IPv6 and IPv4 records

fix: restore standard connection session for Telegram bot and FX rate fetching to enable NAT64 routing on Hugging Face Spaces

debug: add socket.getaddrinfo monkeypatch for api.telegram.org and fix name 'aiohttp' in diagnostics

debug: wrap webhook setup in try-except block to prevent startup failure

debug: add /api/diagnostics endpoint to expose connection diagnostics publicly

debug: add network connection and DNS diagnostic to lifespan startup

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

refactor: implement custom IPv4AiohttpSession to resolve Hugging Face IPv6 connectivity issues

feat: implement FXService and force IPv4 connectivity for bot and API requests

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

Implement premium real-time glassmorphic dashboard served directly on root

first commit