Message Channel Generator

[GenerateMessageChannel] creates a typed MessageChannel<TPayload> factory.

[GenerateMessageChannel(typeof(InventoryAdjustment), FactoryName = "Create", ChannelName = "inventory-adjustments", Capacity = 32)]
public static partial class InventoryChannel;

Set Capacity to a positive value for bounded channels, or leave it at -1 for unbounded channels. BackpressurePolicy maps to MessageChannelBackpressurePolicy and defaults to Reject.

Diagnostics:

• PKCHN001: host type must be partial.
• PKCHN002: capacity must be -1 or greater than zero.