The sdk names no transport

Task 3.7 of novox/hq ADR 0116, and the whole of the sdk's diff for the bus
change. Three comments said AMQP where they meant 'message headers' and 'a
broker client'; the code never spoke it, which is why no module is rebuilt
for any of this (ADR 0039).

src/contracts/index.ts

@@ -19,7 +19,7 @@ export interface ToolDefinition {
 }
 
 /**
- * The metadata that rides an event as AMQP headers (novox/hq ADR 0042). An event's identity and
+ * The metadata that rides an event as message headers (novox/hq ADR 0042). An event's identity and
  * provenance live here, not in the body, so a consumer — or the broker, or an audit tool — reads
  * who/when/what without parsing the payload. An unknown `x-` header is ignored, not refused: an
  * event is observed by parties that need not all understand every header.

src/events/index.ts

@@ -4,7 +4,7 @@
 // credential — just the broker's topic routing). Declared as emits/consumes on the manifest so the
 // mesh knows the event graph.
 //
-// Identity and provenance ride as AMQP headers, not in the body (novox/hq ADR 0042): a consumer —
+// Identity and provenance ride as message headers, not in the body (novox/hq ADR 0042): a consumer —
 // or the broker, or an audit tool — reads who/when/what without parsing the payload, and the body
 // is only the domain payload. This surface hides the header/exchange/queue mechanics; a module
 // names a type and a body and never sees the wire.

src/messaging/index.ts

@@ -25,7 +25,7 @@ export interface Broker {
 /**
  * How a module obtains its broker. The hosting runtime sets this once; module code calls broker()
  * without knowing the concrete binding. Keeping the binding out of the sdk is deliberate — the sdk
- * carries the contract, not a specific AMQP client build.
+ * carries the contract, not a specific broker client build.
  */
 let binding: (() => Broker) | undefined;