Fix tests

Author: stevensJourney

common/src/commonMain/kotlin/com/powersync/sync/StreamingSync.kt

@@ -116,7 +116,7 @@ internal class StreamingSyncClient(
     private val options: SyncOptions,
     private val schema: Schema,
     private val activeSubscriptions: StateFlow<List<SubscriptionGroup>>,
-    private val appMetadata: Map<String, String>,
+    private val appMetadata: Map<String, String> = emptyMap(),
 ) {
     private var isUploadingCrud = AtomicReference<PendingCrudUpload?>(null)
     private var completedCrudUploads = Channel<Unit>(onBufferOverflow = BufferOverflow.DROP_OLDEST)

common/src/commonMain/kotlin/com/powersync/sync/StreamingSyncRequest.kt

@@ -12,7 +12,7 @@ internal data class StreamingSyncRequest(
     @SerialName("include_checksum") val includeChecksum: Boolean = true,
     @SerialName("client_id") val clientId: String,
     val parameters: JsonObject = JsonObject(mapOf()),
-    @SerialName("app_metadata") val appMetadata: Map<String, String>,
+    @SerialName("app_metadata") val appMetadata: Map<String, String> = emptyMap(),
 ) {
     @SerialName("raw_data")
     private val rawData: Boolean = true