Add integration startup service and fix Doxygen (fw 0.8.1).

Replace the services stub with IntegrationService for boot preset recall and tune orchestration, persist last preset in NVS, and remove invalid @return tags that broke CI on T4 metadata headers.

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

Software/components/secure_store/include/secure_store/NvsSecureStore.hpp

@@ -111,6 +111,17 @@ public:
 
     [[nodiscard]] std::expected<void, core::StoreError>
     clearStationList() override;
+
+    [[nodiscard]] bool hasLastPresetIndex() const override;
+
+    [[nodiscard]] std::expected<void, core::StoreError>
+    saveLastPresetIndex(std::uint8_t index) override;
+
+    [[nodiscard]] std::expected<std::uint8_t, core::StoreError>
+    loadLastPresetIndex() const override;
+
+    [[nodiscard]] std::expected<void, core::StoreError>
+    clearLastPresetIndex() override;
 };
 
 } // namespace secure_store