fix(chat): DM SSE read timeout을 제거한다

app/src/test/java/kr/co/vividnext/sodalive/v2/main/chat/dm/DmChatEventClientTest.kt

@@ -10,6 +10,7 @@ import okhttp3.Response
 import okhttp3.ResponseBody.Companion.toResponseBody
 import org.junit.Assert.assertEquals
 import org.junit.Assert.assertNotNull
+import org.junit.Assert.assertTrue
 import org.junit.Test
 import java.util.concurrent.CountDownLatch
 import java.util.concurrent.TimeUnit
@@ -91,6 +92,43 @@ class DmChatEventClientTest {
         assertEquals("SSE stream closed", failure?.message)
     }
 
+    @Test
+    fun `SSE 전용 client는 공유 client의 read timeout을 제거한다`() {
+        val requestLatch = CountDownLatch(1)
+        var requestReadTimeoutMillis: Int? = null
+        val baseClient = OkHttpClient.Builder()
+            .readTimeout(60, TimeUnit.SECONDS)
+            .addInterceptor { chain ->
+                requestReadTimeoutMillis = chain.readTimeoutMillis()
+                requestLatch.countDown()
+                Response.Builder()
+                    .request(chain.request())
+                    .protocol(Protocol.HTTP_1_1)
+                    .code(200)
+                    .message("test")
+                    .body("event: connected\n\n".toResponseBody("text/event-stream".toMediaType()))
+                    .build()
+            }
+            .build()
+
+        val client = DmChatEventClient(
+            okHttpClient = baseClient,
+            gson = Gson(),
+            baseUrl = "https://example.com"
+        )
+
+        client.connect(
+            token = "test-token",
+            roomId = 10L,
+            listener = TestListener()
+        )
+
+        assertTrue(requestLatch.await(2, TimeUnit.SECONDS))
+
+        assertEquals(60_000, baseClient.readTimeoutMillis)
+        assertEquals(0, requestReadTimeoutMillis)
+    }
+
     private fun clientWithResponse(
         code: Int,
         body: String