OPAL case-sensitive filtering with tilde

OPAL filters are case-insensitive by default. Case-sensitive filtering is used with the filter ~ operator.

Given the following string:

log: 2024-04-06T12:49:00Z,eventName=GetPolicy

The following example uses the ~ operator for case insensitive match to a string, regardless of quotes.

filter eventName~"GetPolicy"  //matches
filter eventName~"getpolicy"  //matches
filter eventName~GetPolicy    //matches
filter eventName~getpolicy    //matches