[BUG] APT codegen optimization

### Problem Description
ObjectReaderCreatorASM has optimization branch for field name length between 5 and 7.

https://github.com/alibaba/fastjson2/blob/88a4f7c508fe010d1c5eb38124d92f58d62c23fa/core/src/main/java/com/alibaba/fastjson2/reader/ObjectReaderCreatorASM.java#L1621-L1660

But JSONCompiledAnnotationProcessor is missing corresponding branch.

https://github.com/alibaba/fastjson2/blob/88a4f7c508fe010d1c5eb38124d92f58d62c23fa/codegen/src/main/java/com/alibaba/fastjson2/internal/processor/JSONCompiledAnnotationProcessor.java#L833-L836

### Environment Information
- Fastjson2 2.0.52-SNAPSHOT

Compare the field-name-length branches in core/src/main/java/com/alibaba/fastjson2/reader/ObjectReaderCreatorASM.java around lines 1621-1660 with codegen/src/main/java/com/alibaba/fastjson2/internal/processor/JSONCompiledAnnotationProcessor.java around lines 833-836. Trace the existing generated-reader validation entry points, then confirm that annotation-processor output handles field names of length 5 through 7 with the corresponding optimization.

Written by the indexing model from the issue text.