feat: implement async database session management with auto-migration and historical data seeding

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

test: add scripts for local bot handler testing and database migration verification

Update Telegram autocomplete command list registration on startup

Update README to document simplified daily rates list subscription architecture

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

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

fix: implement NullPool and disable statement caching for PgBouncer compatibility

fix: resolve create_engine type error and use dynamic prepared statement names

feat: add production webhook safeguard for local development

fix: disable sqlalchemy prepared statement cache for pgbouncer compatibility

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

fix: use timezone-naive UTC for created_at to avoid pgsql dataerror

fix: disable prepared statement cache for pgcat/supavisor connection pooler

feat: add database connectivity test script for Supabase PostgreSQL instance

feat: add script to verify asynchronous database connection to Supabase

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: resolve SQLite/PostgreSQL PgBouncer database parameter mismatch and add self-healing BIGINT migration for Telegram user chat_id

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

feat: add test scripts for Telegram bot functionality and webhook integration

Fix markdown parsing, asyncpg prepared statements, and flexible command arguments

feat: implement asynchronous SQLAlchemy database session management and initialization

feat: implement database schema, async session management, and bot command handlers for FlyRates

Add Hugging Face configuration to README

Update README.md and fix encoding

Added Hugging Face Sync Action

first commit