Resolve Descriptor generic type to derive natural names in DescriptorConfigurator

[somiljain2006]

Derive Descriptor names from the generic type when @Symbolis absent. Resolve TODO in DescriptorConfigurator by extracting Descriptor type parameter to compute default camelCase names. Includes fallback handling and anonymous class support

Added unit tests covering:

• @Symbol-based name resolution
• Generic type extraction
• Parameterized types
• Deep inheritance hierarchies
• Fallback behavior (including anonymous classes)

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[timja]

Seems ok