fix: resolve Kotlin variance error in MLResult.kt

- Add @UnsafeVariance annotation to fix 'out' type parameter usage in input position
- Ensures compilation succeeds with the new error handling infrastructure

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/src/main/java/com/quillstudios/pokegoalshelper/ml/MLResult.kt

@@ -20,7 +20,7 @@ sealed class MLResult<out T>
     /**
      * Returns the data if successful, or the default value if error
      */
-    fun getOrDefault(default: T): T = when (this)
+    fun getOrDefault(default: @UnsafeVariance T): T = when (this)
     {
         is Success -> data
         is Error -> default