Normalize call normalizeRecord if necessary

[johndodev]

Monolog version 3

Hello,

When you format a logRecord with JsonFormater::format(), it calls:

• NormalizeFormatter::format()
• NormalizeFormatter::normalizeRecord()

As a result, we get a nicely formatted record, including any exception data, if present.

However, when we try to format an array of records using JsonFormater::formatBatch() :

• JsonFormater::formatBatchJson()
• JsonFormater::normalize()

We lose the exception data.

As I understand, formatBatch is a way to format array of records in an optimized way if possible, with the output being the same as formatting each record individually in a foreach.

If this is the case, it may be a bug, and this PR fixes it for me.
I don't know if this issue affects anything other than exception data, but it was this specific case that led me to discover the problem.
For more context, I was writing a custom Handler, where I call this->getFormatter()->formatBatch($records); in handleBatch().