refactor: remove Default companion object from Configuration and simplify StreamableHttpServerTransport constructor

Author: kpavlov

kotlin-sdk-server/api/kotlin-sdk-server.api

@@ -194,9 +194,7 @@ public final class io/modelcontextprotocol/kotlin/sdk/server/StdioServerTranspor
 
 public final class io/modelcontextprotocol/kotlin/sdk/server/StreamableHttpServerTransport : io/modelcontextprotocol/kotlin/sdk/shared/AbstractTransport {
 	public static final field STANDALONE_SSE_STREAM_ID Ljava/lang/String;
-	public fun <init> ()V
 	public fun <init> (Lio/modelcontextprotocol/kotlin/sdk/server/StreamableHttpServerTransport$Configuration;)V
-	public synthetic fun <init> (Lio/modelcontextprotocol/kotlin/sdk/server/StreamableHttpServerTransport$Configuration;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
 	public fun <init> (ZZLjava/util/List;Ljava/util/List;Lio/modelcontextprotocol/kotlin/sdk/server/EventStore;Ljava/lang/Long;)V
 	public synthetic fun <init> (ZZLjava/util/List;Ljava/util/List;Lio/modelcontextprotocol/kotlin/sdk/server/EventStore;Ljava/lang/Long;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
 	public fun close (Lkotlin/coroutines/Continuation;)Ljava/lang/Object;
@@ -214,7 +212,6 @@ public final class io/modelcontextprotocol/kotlin/sdk/server/StreamableHttpServe
 }
 
 public final class io/modelcontextprotocol/kotlin/sdk/server/StreamableHttpServerTransport$Configuration {
-	public static final field Companion Lio/modelcontextprotocol/kotlin/sdk/server/StreamableHttpServerTransport$Configuration$Companion;
 	public synthetic fun <init> (ZZLjava/util/List;Ljava/util/List;Lio/modelcontextprotocol/kotlin/sdk/server/EventStore;Lkotlin/time/Duration;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
 	public synthetic fun <init> (ZZLjava/util/List;Ljava/util/List;Lio/modelcontextprotocol/kotlin/sdk/server/EventStore;Lkotlin/time/Duration;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
 	public final fun getAllowedHosts ()Ljava/util/List;
@@ -225,10 +222,6 @@ public final class io/modelcontextprotocol/kotlin/sdk/server/StreamableHttpServe
 	public final fun getRetryInterval-FghU774 ()Lkotlin/time/Duration;
 }
 
-public final class io/modelcontextprotocol/kotlin/sdk/server/StreamableHttpServerTransport$Configuration$Companion {
-	public final fun getDefault ()Lio/modelcontextprotocol/kotlin/sdk/server/StreamableHttpServerTransport$Configuration;
-}
-
 public final class io/modelcontextprotocol/kotlin/sdk/server/WebSocketMcpKtorServerExtensionsKt {
 	public static final fun mcpWebSocket (Lio/ktor/server/application/Application;Ljava/lang/String;Lkotlin/jvm/functions/Function0;)V
 	public static final fun mcpWebSocket (Lio/ktor/server/application/Application;Lkotlin/jvm/functions/Function0;)V

kotlin-sdk-server/src/commonMain/kotlin/io/modelcontextprotocol/kotlin/sdk/server/StreamableHttpServerTransport.kt

@@ -72,8 +72,7 @@ private data class SessionContext(val session: ServerSSESession?, val call: Appl
  */
 @OptIn(ExperimentalUuidApi::class, ExperimentalAtomicApi::class)
 @Suppress("TooManyFunctions")
-public class StreamableHttpServerTransport(private val configuration: Configuration = Configuration.Default) :
-    AbstractTransport() {
+public class StreamableHttpServerTransport(private val configuration: Configuration) : AbstractTransport() {
 
     /**
      * Secondary constructor for `StreamableHttpServerTransport` that simplifies initialization by directly taking the
@@ -142,11 +141,7 @@ public class StreamableHttpServerTransport(private val configuration: Configurat
         public val allowedOrigins: List<String>? = null,
         public val eventStore: EventStore? = null,
         public val retryInterval: Duration? = null,
-    ) {
-        public companion object {
-            public val Default: Configuration = Configuration()
-        }
-    }
+    )
 
     public var sessionId: String? = null
         private set