fix: E2E test fixes for VIEW_UPDATE pipeline validation

Critical fixes:
- BaseRumViewTest: DatadogSite.LOCAL → STAGING (SDK can't init with LOCAL)
- BaseRumViewTest: AlwaysFullView → FullViewOnlyAtStart (enables VIEW_UPDATEs)
- RumSearchResponse: service field as JsonElement? (handles string or array from API)
- RumSearchResponseViewEventAssert: hasService uses inner attributes.attributes.service

Debug logging (non-critical):
- RumViewEventWriter: OOO_SDK_DEBUG for VIEW_UPDATE tracing
- RumViewEventFilter: log when ViewUpdate filtered by full View docVersion
- DataUploadRunnable: OOO_SDK_DEBUG batch upload logging
- KtorHttpResponse: POLL_DEBUG for HTTP status
- RumViewUpdateTest: POLL_DEBUG in predicate

Author: andreicoj

reliability/with-backend/src/androidTest/kotlin/com/datadog/android/core/integration/tests/rum/BaseRumViewTest.kt

@@ -60,7 +60,7 @@ abstract class BaseRumViewTest {
             variant = "debug",
             service = "test-service"
         )
-            .useSite(DatadogSite.LOCAL)
+            .useSite(DatadogSite.STAGING)
             .setBatchSize(BatchSize.SMALL)
             .setUploadFrequency(UploadFrequency.FREQUENT)
             .build()
@@ -100,7 +100,7 @@ abstract class BaseRumViewTest {
             .apply {
                 _RumInternalProxy.setRumViewEventWriteConfig(
                     builder = this@apply,
-                    config = RumViewEventWriteConfig.AlwaysFullView
+                    config = RumViewEventWriteConfig.FullViewOnlyAtStart
                 )
             }
             .build()

reliability/with-backend/src/androidTest/kotlin/com/datadog/android/core/integration/tests/rum/RumSearchResponse.kt

@@ -24,7 +24,7 @@ internal data class RumSearchResponse(
 
     @Serializable
     data class RumEventAttributes(
-        @SerialName("service") val service: String? = null,
+        @SerialName("service") val service: kotlinx.serialization.json.JsonElement? = null,
         @SerialName("attributes") val attributes: RumAttributes,
         @SerialName("timestamp") val timestamp: String,
         @SerialName("tags") val tags: List<String> = emptyList()

reliability/with-backend/src/androidTest/kotlin/com/datadog/android/core/integration/tests/rum/RumSearchResponseViewEventAssert.kt

@@ -102,8 +102,8 @@ internal class RumSearchResponseViewEventAssert(actual: RumSearchResponse.ViewEv
     }
 
     fun hasService(service: String): RumSearchResponseViewEventAssert {
-        assertThat(actual.attributes.service)
-            .overridingErrorMessage("Expected service to be <%s> but was <%s>", service, actual.attributes.service)
+        assertThat(actual.attributes.attributes.service)
+            .overridingErrorMessage("Expected service to be <%s> but was <%s>", service, actual.attributes.attributes.service)
             .isEqualTo(service)
         return this
     }

reliability/with-backend/src/androidTest/kotlin/com/datadog/android/core/integration/tests/rum/RumViewUpdateTest.kt

@@ -103,7 +103,11 @@ class RumViewUpdateTest : BaseRumViewTest() {
                         contextAttributes = mapOf("test_view_index" to 14)
                     )
                 },
-                predicate = { it.optionalResult?.data?.firstOrNull() != null },
+                predicate = {
+                    val found = it.optionalResult?.data?.firstOrNull() != null
+                    android.util.Log.w("POLL_DEBUG", "predicate: found=$found")
+                    found
+                },
                 interval = POLLING_INTERVAL_MS.milliseconds,
                 timeout = POLLING_TIMEOUT_MS.milliseconds
             )
@@ -201,7 +205,7 @@ class RumViewUpdateTest : BaseRumViewTest() {
 
     companion object {
         private const val VIEW_NAME = "rum-view-update-test"
-        private const val POLLING_TIMEOUT_MS = 30_000L
+        private const val POLLING_TIMEOUT_MS = 60_000L
         private const val POLLING_INTERVAL_MS = 5_000L
     }
 }

reliability/with-backend/src/androidTest/kotlin/com/datadog/android/core/integration/tests/utils/KtorHttpResponse.kt

@@ -39,13 +39,25 @@ internal suspend inline fun <reified T : Any> HttpClient.safePost(url: Url, body
         }
         val statusCode = response.status
         when (statusCode.value) {
-            in 500..599 -> KtorHttpResponse.ServerError(statusCode)
-            in 400..499 -> KtorHttpResponse.ClientError(statusCode)
-            else -> KtorHttpResponse.Success(response.body())
+            in 500..599 -> {
+                android.util.Log.w("POLL_DEBUG", "safePost ServerError: $statusCode")
+                KtorHttpResponse.ServerError(statusCode)
+            }
+            in 400..499 -> {
+                val bodyText = response.bodyAsText()
+                android.util.Log.w("POLL_DEBUG", "safePost ClientError: $statusCode body=$bodyText")
+                KtorHttpResponse.ClientError(statusCode)
+            }
+            else -> {
+                android.util.Log.w("POLL_DEBUG", "safePost Success: $statusCode")
+                KtorHttpResponse.Success(response.body())
+            }
         }
     } catch (e: IOException) {
+        android.util.Log.w("POLL_DEBUG", "safePost IOException: ${e.message}")
         KtorHttpResponse.IOError(e)
     } catch (e: Exception) {
+        android.util.Log.w("POLL_DEBUG", "safePost Exception: ${e.javaClass.simpleName}: ${e.message}")
         KtorHttpResponse.UnknownException(e)
     }
 }