feat(sdk-license): LicenseInitializerProvider 自动完成全量 SDK 初始化

ContentProvider 在 Application.onCreate() 之前运行，读取
assets/xuqm/license.xuqm 后直接调用 XuqmSDK.initialize()。
app 端只需放入 license 文件，无需任何初始化代码。

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

sdk-license/src/main/java/com/xuqm/sdk/license/internal/LicenseInitializerProvider.kt

@@ -4,10 +4,20 @@ import android.content.ContentProvider
 import android.content.ContentValues
 import android.database.Cursor
 import android.net.Uri
+import com.xuqm.sdk.XuqmSDK
 
 class LicenseInitializerProvider : ContentProvider() {
     override fun onCreate(): Boolean {
-        context?.let(LicenseContextHolder::init)
+        val ctx = context ?: return true
+        LicenseContextHolder.init(ctx)
+        // Auto-initialize the full SDK if a license file is present in assets/xuqm/.
+        // Runs before Application.onCreate(), so no app-level init code is needed.
+        runCatching {
+            val licenseFile = LicenseFileReader.read(ctx) ?: return@runCatching
+            val appKey = licenseFile.appKey.takeIf { it.isNotBlank() } ?: return@runCatching
+            val serverUrl = licenseFile.serverUrl?.takeIf { it.isNotBlank() }
+            XuqmSDK.initialize(ctx, appKey, serverUrl)
+        }
         return true
     }