Changes to List wallet alerts

the alerts/items/previous_value response's property type changed from number to string for status 200

added the new optional query request parameter page

added the new optional query request parameter per_page

added the optional property alerts/items/thresholds/items/allOf[#/components/schemas/AlertThresholdBaseObject]/notify_on to the response with the 200 status

the response property alerts/items/direction became required for the status 200

the response property alerts/items/lago_wallet_id became required for the status 200

the response property alerts/items/wallet_code became required for the status 200

the alerts/items/thresholds/items/allOf[subschema #2]/value response's property pattern was changed from ^[0-9]+.?[0-9]*$ to ^-?[0-9]+(\.[0-9]+)?$ for the status 200