Describe the bug

This regression was introduced in v6.3.11 and probably linked to 55df57f (#6050).

When JSON properties contain dates, they were previously hydrated back as Javascript Dates. Now, they are hydrated as strings.

Reproduction

Here is a test case: https://github.com/alexandre-abrioux/mikro-orm-issues/blob/iss-6076/src/example.test.ts

What driver are you using?

@mikro-orm/sqlite

MikroORM version

6.3.11

Node.js version

22.4.0

Operating system

No response

Validations

• Read the Contributing Guidelines.
• Read the docs.
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• The provided reproduction is a minimal reproducible example of the bug.