fix: tidy optional-dependency handling in core (0.4.0)

CHANGELOG.md

@@ -1,3 +1,16 @@
+# 0.4.0 / 2026-05-30
+
+* [IMPROVEMENT] Make `okhttp`, `gson` and `androidx.work:work-runtime` `compileOnly` dependencies so the SDK no longer forces specific versions on host apps. **Breaking:** integrating apps must now declare `okhttp` and `gson` themselves; `Datadog.initialize()` fails fast with `IllegalStateException` if either is missing. WorkManager remains optional — when absent the SDK logs a warning and disables background upload.
+* [IMPROVEMENT] WorkManager presence/initialization is now detected safely (reflection on 2.8.0+, getInstance fallback on older versions) to support it being `compileOnly`.
+* [FEATURE] Add no-op variants for Logs, Profiling, Flags, OpenFeature Flags and Session Replay (incl. Compose/Material) feature modules.
+
+---
+
+> The entries above are **FlashCat SDK** releases, versioned independently as `0.x`.
+> Everything below is the inherited **upstream Datadog `dd-sdk-android`** changelog (`3.x`) that this fork tracks — kept for reference.
+
+---
+
 # 3.5.0 / 2026-01-08
 
 * [FEATURE] RUM Debug Widget. See [#2943](https://github.com/DataDog/dd-sdk-android/pull/2943)

buildSrc/src/main/kotlin/com/datadog/gradle/config/AndroidConfig.kt

@@ -40,7 +40,7 @@ object AndroidConfig {
             }
             // Local development or other branches → Snapshot
             else -> {
-                Version(0, 3, 1, Version.Type.Snapshot)
+                Version(0, 4, 0, Version.Type.Snapshot)
             }
         }
     }

dd-sdk-android-core/api/apiSurface

@@ -344,8 +344,6 @@ fun <T> java.util.concurrent.Future<T>?.getSafe(String, com.datadog.android.api.
 object com.datadog.android.core.internal.utils.JsonSerializer
   fun toJsonElement(Any?): com.google.gson.JsonElement
   fun Map<String, Any?>.safeMapValuesToJson(com.datadog.android.api.InternalLogger): Map<String, com.google.gson.JsonElement>
-fun isInitialized(android.content.Context): Boolean
-fun getWorkManagerOrNull(android.content.Context): androidx.work.WorkManager?
 enum com.datadog.android.core.metrics.MethodCallSamplingRate
   constructor(Float)
   - ALL

dd-sdk-android-core/api/dd-sdk-android-core.api

@@ -890,11 +890,6 @@ public final class com/datadog/android/core/internal/utils/JsonSerializer {
 	public final fun toJsonElement (Ljava/lang/Object;)Lcom/google/gson/JsonElement;
 }
 
-public final class com/datadog/android/core/internal/utils/WorkManagerUtilsKt {
-	public static final fun getWorkManagerOrNull (Landroid/content/Context;)Landroidx/work/WorkManager;
-	public static final fun isInitialized (Landroid/content/Context;)Z
-}
-
 public final class com/datadog/android/core/metrics/MethodCallSamplingRate : java/lang/Enum {
 	public static final field ALL Lcom/datadog/android/core/metrics/MethodCallSamplingRate;
 	public static final field HIGH Lcom/datadog/android/core/metrics/MethodCallSamplingRate;

dd-sdk-android-core/src/main/kotlin/com/datadog/android/Datadog.kt

@@ -450,7 +450,7 @@ object Datadog {
                 Locale.US,
                 missingDependencies.joinToString(", ")
             )
-            android.util.Log.e("Datadog", message)
+            Log.e("Datadog", message)
             unboundInternalLogger.log(
                 InternalLogger.Level.ERROR,
                 InternalLogger.Target.USER,

dd-sdk-android-core/src/main/kotlin/com/datadog/android/core/internal/lifecycle/ProcessLifecycleCallback.kt

@@ -7,7 +7,6 @@
 package com.datadog.android.core.internal.lifecycle
 
 import android.content.Context
-import androidx.work.WorkManager
 import com.datadog.android.api.InternalLogger
 import com.datadog.android.core.internal.utils.cancelUploadWorker
 import com.datadog.android.core.internal.utils.isInitialized

dd-sdk-android-core/src/main/kotlin/com/datadog/android/core/internal/utils/WorkManagerUtils.kt

@@ -106,11 +106,11 @@ private val officialIsInitializedMethod: Method? by lazy {
 private var isInitializedCache: Boolean? = null
 
 /**
- * 判断 WorkManager 是否已初始化。
- * 兼容 WorkManager 2.8.0+ (反射调用官方方法) 和旧版本 (try-catch getInstance)。
- * 安全应对 compileOnly 导致的类缺失。
+ * Checks whether WorkManager has been initialized.
+ * Compatible with WorkManager 2.8.0+ (reflective call to the official method) and older versions
+ * (try-catch around getInstance). Safely handles the class being absent due to compileOnly.
  */
-fun isInitialized(context: Context): Boolean {
+internal fun isInitialized(context: Context): Boolean {
     isInitializedCache?.let { return it }
 
     if (!isClassAvailable) {
@@ -138,18 +138,3 @@ fun isInitialized(context: Context): Boolean {
         false
     }
 }
-
-/**
- * 安全获取实例，如果未初始化或库不存在则返回 null
- */
-fun getWorkManagerOrNull(context: Context): WorkManager? {
-    return if (isInitialized(context)) {
-        try {
-            WorkManager.getInstance(context)
-        } catch (e: Throwable) {
-            null
-        }
-    } else {
-        null
-    }
-}

dd-sdk-android-core/src/main/kotlin/com/datadog/android/error/internal/DatadogExceptionHandler.kt

@@ -7,7 +7,6 @@
 package com.datadog.android.error.internal
 
 import android.content.Context
-import androidx.work.WorkManager
 import com.datadog.android.api.InternalLogger
 import com.datadog.android.api.feature.Feature
 import com.datadog.android.api.feature.FeatureSdkCore