demo app + SDK updates:\n- Add direct ANI transfer (prepare -> transfer)\n- Add firmware update flow (fetch latest w/ x-api-key, OTA transfer)\n- Extract x-api-key to NetworkConstants\n- Rename example app to demo; move folder and entry to DemoApp\n- Switch from SPM package dependency to local framework target\n- Enable automatic Info.plist generation for framework target\n- Add placeholder test to satisfy SwiftPM test target\n- Regenerate XcodeGen project (demo.xcodeproj)

Sources/DuooomiBleSDK/Models/PrepareTransferResponse.swift

@@ -0,0 +1,8 @@
+import Foundation
+
+public struct PrepareTransferResponse: Codable, Sendable, Equatable {
+    public let type: Int
+    public let key: String
+    /// "ready" | "no_space" | "duplicated"
+    public let status: String
+}