Model type "buffer" is not working

Nessuno ha ancora preso questa issue.

### Describe the bug

Getting below error after creating model with **buffer** type property.

> Request POST /tests failed with status code 500. Error: type must be JSONType or JSONType[]: buffer

**Model Property** (Entity):
`@property({
type: 'buffer',
})
image?: Buffer;
`
Steps to reproduce:
1. Create new app: lb4 app
2. Add new model with buffer type property (not required field): lb4 model
3. Add any type of db: lb4 datasource
4. Create repository: lb4 repository
5. Create controller with all CRUD operations: lb4 controller
6. Test POST request on explorer

### Logs

```shell
Request POST /tests failed with status code 500. Error: type must be JSONType or JSONType[]: buffer
at getJSONTypes (/Users/shailendrasingh/Documents/workspace/testapp/node_modules/ajv/lib/compile/validate/dataType.ts:36:9)
at getSchemaTypes (/Users/shailendrasingh/Documents/workspace/testapp/node_modules/ajv/lib/compile/validate/dataType.ts:20:17)
at typeAndKeywords (/Users/shailendrasingh/Documents/workspace/testapp/node_modules/ajv/lib/compile/validate/index.ts:159:31)
at subSchemaObjCode (/Users/shailendrasingh/Documents/workspace/testapp/node_modules/ajv/lib/compile/validate/index.ts:147:3)
at subschemaCode (/Users/shailendrasingh/Documents/workspace/testapp/node_modules/ajv/lib/compile/validate/index.ts:124:7)
at KeywordCxt.subschema (/Users/shailendrasingh/Documents/workspace/testapp/node_modules/ajv/lib/compile/validate/index.ts:491:5)
at applyPropertySchema (/Users/shailendrasingh/Documents/workspace/testapp/node_modules/ajv/lib/vocabularies/applicator/properties.ts:45:11)
at Object.code (/Users/shailendrasingh/Documents/workspace/testapp/node_modules/ajv/lib/vocabularies/applicator/properties.ts:32:9)
at keywordCode (/Users/shailendrasingh/Documents/workspace/testapp/node_modules/ajv/lib/compile/validate/index.ts:523:9)
at /Users/shailendrasingh/Documents/workspace/testapp/node_modules/ajv/lib/compile/validate/index.ts:265:9
at CodeGen.code (/Users/shailendrasingh/Documents/workspace/testapp/node_modules/ajv/lib/compile/codegen/index.ts:525:33)
at CodeGen.block (/Users/shailendrasingh/Documents/workspace/testapp/node_modules/ajv/lib/compile/codegen/index.ts:680:20)
at iterateKeywords (/Users/shailendrasingh/Documents/workspace/testapp/node_modules/ajv/lib/compile/validate/index.ts:262:7)
at groupKeywords (/Users/shailendrasingh/Documents/workspace/testapp/node_modules/ajv/lib/compile/validate/index.ts:241:7)
at /Users/shailendrasingh/Documents/workspace/testapp/node_modules/ajv/lib/compile/validate/index.ts:233:38
at CodeGen.code (/Users/shailendrasingh/Documents/workspace/testapp/node_modules/ajv/lib/compile/codegen/index.ts:525:33)
```

### Additional information

_No response_

### Reproduction

https://github.com/shailendramonu/testlb4app

Apri la riproduzione collegata e ricrea il model, datasource, repository, controller generato e la richiesta POST descritta nell’issue. Traccia il percorso di validazione che rifiuta la proprietà Buffer opzionale del model, quindi aggiungi una coverage che dimostri che la richiesta POST non fallisce più con l’errore AJV JSONType.

Scritto dal modello di indicizzazione a partire dal testo della issue.