(feat) add audit logging plugin

[wrmedford]

This creates a method for audit logging with scrubbing. This is useful for highly controlled environments where any human interaction with a database needs to be logged for potential review.

Example config:

[pools.mypool.plugins.query_sanitizer]                                                                          
 enabled = true                                                                                                  
 patterns = [                                                                                                    
   "\\b\\d{4}[- ]?\\d{4}[- ]?\\d{4}[- ]?\\d{4}\\b", # Credit card numbers
   "^(?!666|000|9\\d{2})\\d{3}-(?!00)\\d{2}-(?!0{4})\\d{4}$", # Social Security Numbers
   "\\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,}\\b" # Email addresses                                     
 ]