Regression after #3928 -- some nullable columns in sqlite do not load

[martin-kolarik]

I have found these related issues/pull requests

n/a

Description

After merging #3928 to my smol/async-global-executor branch, some loads of null values from nullable columns fail. Errors:

• sqlite BLOB: invalid length: expected 16 bytes, found 0 (Uuid type)
• sqlite DATETIME: invalid datetime

Reproduction steps

try to read null Uuid value from sqlite nullable BLOB

SQLx version

24317d5

Enabled SQLx features

runtime-async-global-executor, chrono, rust_decimal, uuid

Database server and version

sqlite default from slqx

Operating system

Win11

Rust version

1.90-nigthly