Feat: Track Operator fee splits

[gowthamsundaresan]

Since Operators can now set variable fees, factor in Operator fees (fetching from ee-backend) in the API routes

[linear]

SE-57 Feat: Track Operator fees

Since Operators can now set variable fees, in lat-backend we need to collect this info as it will inform the manager and will also pass into the API route that displays all fees