CSV Import with Dedupe Detection

Required columns:

• partner_name - Partner program name
• website_url - Main domain (e.g., example.com)

Optional columns:

• category - Category (Brokers, Crypto Tools, VPS, etc.)
• network - Affiliate network (Awin, PartnerStack, etc.)
• signup_url - URL to sign up for the program
• affiliate_tracking_url - Affiliate tracking link (if available)
• notes - Additional notes