Remove platform commission from WiFi sales

Add captive portal free promo claims

Include expiry in token start alerts

Alert tenants for token lifecycle events

Send SMS when WiFi token expires

plan leak fix, manual sales, payment status support, manual sms template and docs

Add tenant purchase revenue alerts

simplify OTP SMS messages to just the code

remove auto-trial on registration; admin grants trial manually

Add tenant profile customization endpoints

Initial commit — multi-tenant WiFi hotspot monetization platform