Define __repr__ methods for StreamConfig and PaginationConfig
Define __repr__ methods for StreamConfig and PaginationConfig

So that they can be used with "%r" log formats.

iot-factory/synapse,TribeMedia/synapse,iot-factory/synapse,iot-factory/synapse,matrix-org/synapse,TribeMedia/synapse,matrix-org/synapse,TribeMedia/synapse,matrix-org/synapse,matrix-org/synapse,iot-factory/synapse,TribeMedia/synapse,iot-factory/synapse,matrix-org/synapse,TribeMedia/synapse,matrix-org/synapse