Major protocol/API change: replace SignalReceiveParams with SignalParams everywhere. SignalParams now carries packed method parameters as a single byte[] and provides SetParameterValues/GetParameterValues for type-safe packing/unpacking. All hub/client interfaces, method signatures, and dispatch logic updated. Legacy parameter serialization helpers removed; all parameter logic is encapsulated in SignalParams. Documentation and tests updated to reflect new wire format and flow. This unifies parameter handling, clarifies the protocol, and enables robust, extensible type-guided serialization. Breaking change.