/convex-action

Create a new Convex action for external API calls or long-running tasks

# Create Convex Action

Create a new Convex action following best practices:

1. Add `"use node";` at the top of the file if using Node.js modules
2. Use `action` or `internalAction` from "./_generated/server"
3. Include argument validators using `v` from "convex/values"
4. Include return validators
5. Use `ctx.runQuery()` and `ctx.runMutation()` for database access

The action should be for: $ARGUMENTS

Follow these rules:
- Actions do NOT have direct database access - use `ctx.runQuery()` and `ctx.runMutation()`
- Add `"use node";` at the top for Node.js built-in modules
- Files with `"us...