messages: pure builders for every event the bridge sends

src/messages builds Response, StateReport, DeferredResponse, ErrorResponse, ChangeReport and the scene, doorbell
and simple events from plain values; messageId and times are parameters, so a test compares whole objects.
StateBuilder collects properties checked by the descriptors, AlexaError and AlexaErrors carry the payload fields
of an error type. AlexaStatusMessage and AlexaErrorResponse move to src/compat and are written on the builders.
On the wire, against 1.5.2: a DeferredResponse has no context key, a ChangeReport has no correlationToken, the
namespace of an ErrorResponse follows its type, and a ChangeReport without a changed property is not published:
send() resolves "" and the bridge reports an error that names the endpoint.
143 tests pass (108 before).

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

dist/esm/AlexaStatusMessage.d.ts

@@ -1,74 +0,0 @@
-import type { EndpointHealth, PowerController } from "./compat/enums.js";
-import type { MqttClient } from "mqtt";
-export declare enum ThermostatMode {
-    OFF = "OFF",
-    HEAT = "HEAT",
-    COOL = "COOL",
-    AUTO = "AUTO",
-    ECO = "ECO",
-    CUSTOM = "CUSTOM"
-}
-export declare enum TemperatureSensorScale {
-    CELSIUS = "CELSIUS",
-    FAHRENHEIT = "FAHRENHEIT"
-}
-interface ContextProperty {
-    namespace: string;
-    name: string;
-    value: any;
-    timeOfSample: string;
-    uncertaintyInMilliseconds: number;
-    instance?: string;
-}
-/** Why a ChangeReport is sent (Alexa.ChangeReport payload.change.cause.type). */
-export type ChangeCause = "APP_INTERACTION" | "PHYSICAL_INTERACTION" | "PERIODIC_POLL" | "RULE_TRIGGER" | "VOICE_INTERACTION";
-export declare class AlexaStatusMessage {
-    private context;
-    /** ChangeReport only: the properties that changed (payload.change.properties); the rest go to context. */
-    private changeProps;
-    private changeCause;
-    private target;
-    private event;
-    private rootTopic;
-    private endpointId;
-    private mqttClient;
-    private isDeferred;
-    /** Where a failed publish is reported (set by the Device that built this message, 1.5.2): send() never rejects. */
-    onPublishError?: (err: Error) => void;
-    constructor(correlationToken: string, rootTopic: string, endpointId: string, mqttClient: MqttClient, isResponse?: boolean, isDeferred?: boolean, changeCause?: ChangeCause | null);
-    private getTimestamp;
-    private addProperty;
-    /** ChangeReport: the add*Prop calls that follow describe what CHANGED (the default for a change report). */
-    changed(): this;
-    /** ChangeReport: the add*Prop calls that follow describe the other, unchanged properties (context). */
-    unchanged(): this;
-    /** True for a ChangeReport (Device.getChangeReport). */
-    isChangeReport(): boolean;
-    /** The message as it will be published (for tests and logging). */
-    toJSON(): {
-        event: any;
-        context: {
-            properties: ContextProperty[];
-        } | null;
-    };
-    addModeControllerProp(instance: string, value: string, uncertaintyInMs?: number): this;
-    addThermostatModeProp(mode: string, uncertaintyInMs?: number): this;
-    addEstimatedDeferralTime(seconds: number): this;
-    addThermostatControllerProp(name: "lowerSetpoint" | "upperSetpoint" | "targetSetpoint", scale: TemperatureSensorScale, value: number, uncertaintyInMs?: number): this;
-    /** Alexa.EndpointHealth connectivity: EndpointHealth.OK / UNREACHABLE (the plain strings "OK" / "UNREACHABLE" are accepted too). */
-    addHealthProp(health: EndpointHealth | `${EndpointHealth}`, uncertaintyInMs?: number): this;
-    addPowerControllerProp(power: PowerController, uncertaintyInMs?: number): this;
-    addTemperatureSensorProp(scale: TemperatureSensorScale, value: number, uncertaintyInMs?: number): this;
-    addBrightnessControllerProp(brightness: number, uncertaintyInMs?: number): this;
-    addColorTemperatureControllerProp(colorTemp: number, uncertaintyInMs?: number): this;
-    addToggleControllerProp(state: PowerController, instance: string, uncertaintyInMs?: number): this;
-    addContextProp(prop: ContextProperty): this;
-    /**
-     * Publish: a Response/StateReport to <root>/<endpoint>/alexaResponce (sendAsync: deferredResponse), a ChangeReport
-     * to <root>/changeReport (Alex2MQTT adds the user's token and posts it to the Alexa event gateway). Resolves with
-     * the topic, or "" when the publish failed - the error then goes to the bridge's "error" event (when listened to).
-     * Never rejects (1.5.1 did, so an un-caught send() could kill the host).
-     */
-    send(sendAsync?: boolean): Promise<string>;
-}
-export {};