fix(jetbrains): exclude internal API from verifier failure levels

Kotlin generates synthetic overrides for all ToolWindowFactory interface
methods including ones marked @internal. These are bridge methods, not
actual code overrides. Also drop 2025.1 from verifier since sinceBuild=252.

Author: intel352

build.gradle.kts

@@ -60,9 +60,14 @@ intellijPlatform {
 
     pluginVerification {
         ides {
-            create(org.jetbrains.intellij.platform.gradle.IntelliJPlatformType.IntellijIdeaCommunity, "2025.1")
             create(org.jetbrains.intellij.platform.gradle.IntelliJPlatformType.IntellijIdeaCommunity, "2025.2")
         }
+        // Kotlin generates synthetic overrides for all ToolWindowFactory interface methods,
+        // including ones marked @Internal in newer SDK versions. These are bridge methods,
+        // not actual overrides in our code. Exclude INTERNAL_API_USAGES from failure.
+        failureLevel = org.jetbrains.intellij.platform.gradle.extensions.IntelliJPlatformExtension.PluginVerification.FailureLevel.entries.filter {
+            it != org.jetbrains.intellij.platform.gradle.extensions.IntelliJPlatformExtension.PluginVerification.FailureLevel.INTERNAL_API_USAGES
+        }
     }
 }