LinkedIn Profile Scraper

I want to use the LinkedIn Profile Scraper service on Fast Marketplace.

## Setup (skip if you already have Fast Marketplace set up)
1. Open the marketplace skill: https://marketplace.fast.xyz/skill.md
2. Fund a Fast wallet on mainnet.
3. Provide one or more LinkedIn profile URLs to enrich.
4. Keep the returned job token and poll the marketplace job route for completion.

## Available Endpoints

### Profile Enrichment ($0.0001 USDC)
curl -X POST "https://api.marketplace.fast.xyz/api/apify-linkedin-profile/profile-enrichment" \
  -H "Content-Type: application/json" \
  -d '{
  "profileUrls": [
    "https://www.linkedin.com/in/williamhgates"
  ],
  "includeMobileNumbers": false
}'

Use direct profile URLs when you already know the people you want to enrich and need full normalized profile data back.

For paid endpoints: the first call returns 402. Authorize payment with your Fast wallet and retry with the payment signature header.