Integrate companion-chip status into GET /api/health (fw 0.6.0).

Expose Si4684, ADAU1701, and BT1035 boot flags via CompanionChipStatus after
HardwareBootstrap; update API manual schema for Slice 8.

Co-authored-by: Cursor <cursoragent@cursor.com>

Software/components/core/src/HealthStatus.cpp

@@ -7,11 +7,6 @@
  * Copyright 2026 Michele Bigi
  * SPDX-License-Identifier: Apache-2.0
  *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
  * @author  Michele Bigi
  * @date    2026-07-06
  */
@@ -25,9 +20,24 @@ HealthStatus HealthStatus::ok(FirmwareVersion firmware)
     return HealthStatus(HealthState::Ok, std::move(firmware));
 }
 
+HealthStatus HealthStatus::ok(FirmwareVersion firmware,
+                              CompanionChipStatus chips)
+{
+    return HealthStatus(HealthState::Ok, std::move(firmware), chips);
+}
+
 HealthStatus::HealthStatus(HealthState state, FirmwareVersion firmware)
     : state_(state)
     , firmware_(std::move(firmware))
+    , chips_(std::nullopt)
+{
+}
+
+HealthStatus::HealthStatus(HealthState state, FirmwareVersion firmware,
+                           CompanionChipStatus chips)
+    : state_(state)
+    , firmware_(std::move(firmware))
+    , chips_(chips)
 {
 }
 
@@ -41,4 +51,9 @@ const FirmwareVersion& HealthStatus::firmware() const noexcept
     return firmware_;
 }
 
+const std::optional<CompanionChipStatus>& HealthStatus::chips() const noexcept
+{
+    return chips_;
+}
+
 } // namespace core

Software/components/core/src/HealthStatusJson.cpp

@@ -18,21 +18,13 @@
 
 #include "core/HealthStatusJson.hpp"
 
+#include <optional>
+#include <string>
+
 namespace core {
 
 namespace {
 
-/**
- * @brief    healthStateToken — map HealthState to the API status string.
- *
- * @dname    healthStateToken
- * @param    state  Health indicator to encode.
- * @return   JSON string token without quotes (e.g. ok).
- * @pubstate none
- *
- * @author   Michele Bigi
- * @date     2026-07-06
- */
 [[nodiscard]] const char* healthStateToken(HealthState state) noexcept
 {
     switch (state) {
@@ -46,8 +38,16 @@ namespace {
 
 std::string serializeHealthStatusJson(const HealthStatus& status)
 {
-    return std::string("{\"status\":\"") + healthStateToken(status.state())
-           + "\",\"fw\":\"" + std::string(status.firmware().value()) + "\"}";
+    std::string json = std::string("{\"status\":\"") + healthStateToken(status.state())
+                       + "\",\"fw\":\"" + std::string(status.firmware().value()) + "\"";
+    if (const std::optional<CompanionChipStatus>& chips = status.chips(); chips) {
+        json += std::string(",\"chips\":{")
+                + "\"si4684\":" + (chips->si4684Ready ? "true" : "false")
+                + ",\"adau1701\":" + (chips->adau1701Ready ? "true" : "false")
+                + ",\"bt1035\":" + (chips->bt1035Ready ? "true" : "false") + "}";
+    }
+    json += '}';
+    return json;
 }
 
 } // namespace core