Bug: Token Regex for fileuniqueid* matches too broadly

This Regex matches more than just fileuniqueid* tokens:

https://github.com/pnp/pnpframework/blob/83eaf1f88370b8fd35245a3ce2a01272178f4869/src/lib/PnP.Framework/Provisioning/ObjectHandlers/Utilities/ListItemUtilities.cs#L283

This will be handled OK since exceptions are swallowed, but calls are made that are not necessary (for every field content containing curly braces). So this Regex could be improved to not trigger those redundant calls.

Alternative easy improvement: after this line:
https://github.com/pnp/pnpframework/blob/83eaf1f88370b8fd35245a3ce2a01272178f4869/src/lib/PnP.Framework/Provisioning/ObjectHandlers/Utilities/ListItemUtilities.cs#L308

Add:

if (tokenParts.Length < 2)
{
    continue;
}

This catches most mismatches and prevents further redundant calls.

Start in src/lib/PnP.Framework/Provisioning/ObjectHandlers/Utilities/ListItemUtilities.cs around lines 283 and 308, and inspect how the token regex and tokenParts handling process field content containing curly braces. Confirm the change limits processing to fileuniqueid* tokens and prevents redundant calls for mismatches; done means unrelated curly-brace content no longer reaches the lookup path.