===== Medium Adapter =====

The Medium Adapter provides the interface between the MOSH transport layer and the physical transport mechanism.

Examples include:

UART / Serial
ESP-NOW
nRF24L01
TCP/UDP (for bridges)

Responsibilities include:

Sending raw byte buffers
Receiving raw byte buffers
Handling transport-specific constraints (MTU, timing, buffering)

The transport layer must not depend on any specific medium; all interaction occurs through this abstraction.