Returns a page of networks owned by the calling tenant. A "network" here is the client's own
sub-affiliate network, not the global affiliate-program catalog.

Requires the ListNetworks policy and the partners feature to be enabled.
Paginate with offset (0-based) and limit; filter by free-text term,
one or more network ids, or owning affiliateIds.

🔐 Required permission: networks.read

🚩 Requires feature: partners