fix(snapshot): Move dependency addition outside onVariants loop

testImplementation is a global configuration, not per-variant.
Move the ComposablePreviewScanner dependency addition to
afterEvaluate (gated on enabled) so it runs once instead of
once per variant.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: runningcode

plugin-build/src/main/kotlin/io/sentry/android/gradle/SentryPlugin.kt

@@ -73,14 +73,18 @@ constructor(private val buildEvents: BuildEventListenerRegistryInternal) : Plugi
       project.pluginManager.withPlugin("app.cash.paparazzi") {
         val android = project.extensions.getByType(BaseExtension::class.java)
 
+        project.afterEvaluate {
+          if (extension.snapshots.enabled.get()) {
+            project.dependencies.add(
+              "testImplementation",
+              "io.github.sergio-sastre.ComposablePreviewScanner:android:0.8.1",
+            )
+          }
+        }
+
         androidComponentsExt.onVariants { variant ->
           if (!extension.snapshots.enabled.get()) return@onVariants
 
-          project.dependencies.add(
-            "testImplementation",
-            "io.github.sergio-sastre.ComposablePreviewScanner:android:0.8.1",
-          )
-
           val generateTask =
             GenerateSnapshotTestsTask.register(project, extension.snapshots, android, variant)
           if (AgpVersions.isAGP90(AgpVersions.CURRENT)) {