Sends a daily Discord digest of new public vals from Val Town. It grabs previews of READMEs when it exists. When there's no README, it will send the code to GPT-4o for a summary.

• main.tsx - Main cron function and Discord webhook
• fetch-vals.ts - Fetches and filters new vals using Val Town SDK
• ai-summarizer.ts - Generates OpenAI summaries for vals without READMEs
• [test] scratch.ts - Just for clearing SQLite DB during testing

• We filter out blank vals, or vals with an empty main.tsx
• We filter out commonly remixed val names like Blob Admin, SQLiteExplorer (since we don't have a public API to check remixes)
• Because of missing remixes from the API, we also store hashes of READMEs in a SQLite DB to avoid getting notified about remixes without edits.

1. Set DISCORD_WEBHOOK environment variable
2. Set OPENAI_API_KEY environment variable
3. Set testMode = false in main.tsx for production