fix: add 15-minute Redis dynamic backfill lock in crud.get_stock_history to prevent hammering yfinance on cold database

feat: implement weekly MLOps retraining loop and specialized multi-model router

fix: resolve Celery Beat scheduling, crud logic errors, and implement ATR volatility-adjusted stop-loss levels

feat: implement dynamic historical backfilling from yfinance in get_stock_history

feat: add recently_analyzed and trending_tickers GraphQL queries utilizing prediction logs

feat: add user strategy performance tracker table, lockInStrategy GraphQL mutation, and auto-labeler updates

feat: add MLOps prediction logs table, background labeling task, and model metrics endpoint

feat: add secure 6-digit OTP email verification flow

fix: set database connection timeout to 30s to handle Neon cold starts

feat: implement subscription packages, message limit quotas, and 3-day discount timer

feat: implement real-time price alerts via email with 2-minute reminder loops

feat: implement AI Analyst strategy history and persistence

fix: enable SQLAlchemy pre-ping and connection pool recycle to prevent Neon idle connection drops

feat: bypass backend credit deduction for master testing account

feat: implement Google OAuth, Razorpay webhook, and bug fixes for watchlist and yfinance polling

feat: implement database CRUD operations for users, watchlists, alerts, history, and payments

feat: define database models for User, Payments, Watchlist, Alert, and StockHistory

feat: implement configuration and database session setup for NeonDB and Redis

chore: initial project structure with uv config and gitignore