Google Ads Audit Endpoint

Performs a comprehensive Google Ads audit for a domain:

1. Fetches keyword insights from RapidAPI and selects top 10 keywords by search volume
2. For each keyword, fetches:
   • Google Ads data using SERP API
   • Detailed keyword metrics (search volume, competition, CPC)
   • GPT-generated insights (analysis, opportunities, pain points, recommendations)
3. Returns all data with per-keyword insights only (no aggregate)

All API calls include retry logic with exponential backoff for improved reliability.

This helps identify competitor ads and provides actionable insights for each keyword.