Fix ReflectionGetAttributesMethodReturnTypeExtension for UnionTypes#5463

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Commits on Apr 14, 2026

Use per-class method reflection when resolving dynamic return type extensions on union types
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Iterate over union inner types instead of constructing new ObjectType from class names

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Fix declaring class check in ReflectionGetAttributesMethodReturnTypeExtension instead of modifying MethodCallReturnTypeHelper

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Skip extension for non-native reflection classes instead of removing declaring class check entirely

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Resolve ReflectionAttribute class from method return type instead of str_contains hack

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Handle multiple ReflectionAttribute subclasses in return type resolution

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Return union of GenericObjectType when multiple ReflectionAttribute subclasses match

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Rename resolveReflectionAttributeClassNames to resolveReflectionAttributeType and return Type directly

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Use early exit in resolveReflectionAttributeType to reduce nesting

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