Fix Unity 6000.5 editor compile error in AppleBuildProfileEditor (CS0619)

[oscarmakala]

Problem

Unity 6000.5 completes the InstanceID → EntityId migration and marks AssetDatabase.GetAssetPath(int instanceID) as error-level obsolete (CS0619, not suppressible). AppleBuildProfileEditor.cs calls it via objectReferenceValue.GetInstanceID() in two places (the default Info.plist and default entitlements pickers), so Apple.Core fails to compile in the editor on Unity 6000.5+, which blocks every plug-in that depends on it (GameKit, etc.).

error CS0619: 'AssetDatabase.GetAssetPath(int)' is obsolete

Fix

Use the AssetDatabase.GetAssetPath(UnityEngine.Object) overload directly with objectReferenceValue — it has existed since Unity 5, so the change is compatible with all Unity versions the plug-ins support; no version defines needed.

- string filePath = AssetDatabase.GetAssetPath(_serializedDefaultInfoPlist.objectReferenceValue.GetInstanceID());
+ string filePath = AssetDatabase.GetAssetPath(_serializedDefaultInfoPlist.objectReferenceValue);

(and the same for _serializedDefaultEntitlements.)

Testing

• Compiles clean on Unity 6000.5.9f1 (editor recompile, zero errors) and behaves identically: the returned asset paths are unchanged.
• In production use in a shipping project on 6000.5 (Apple.Core 3.2.0 + GameKit 4.0.1, rebuilt with this patch): editor, iOS device builds, and Game Center flows all working.

Both main and 27-beta currently carry the affected code.

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