Redacting PII data in str/repr of non primitive objects

[declanatkins]

Describe the bug
For objects where the information to be redacted exists in the str/repr of the object but do not match the types that are checked in the redact method, the information to be redacted leaks through.

To Reproduce
Basic Example:

In [1]: import logging

In [2]: import sys

In [3]: import re

In [4]: 

In [4]: LOGGING = {
   ...:     'version': 1,
   ...:     'formatters': {
   ...:         'default': {
   ...:             'format': '%(levelname)s %(message)s',
   ...:         },
   ...:     },
   ...:     'filters':{
   ...:         'pii': {
   ...:             '()': 'loggingredactor.RedactingFilter',
   ...:             'mask_keys': ('password', 'email', 'last_name', 'first_name', 'gender', 'lastname', 'firstname',),
   ...:             'mask_patterns': (re.compile(r'\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Z|a-z]{2,}\b'),), # email regex
   ...:             'mask': 'REDACTED',
   ...:         },
   ...:     },
   ...:     'handlers': {
   ...:         'stdout': {
   ...:             'level': 'DEBUG',
   ...:             'class': 'logging.StreamHandler',
   ...:             'formatter': 'default',
   ...:             'stream': sys.stdout,
   ...:             'filters': ['pii'],
   ...:         },
   ...:     },
   ...:     'loggers': {
   ...:         'default': {
   ...:             'handlers': ['stdout'],
   ...:             'level': 'INFO',
   ...:             'propagate': True,
   ...:         },
   ...:     },
   ...: }

In [5]: 

In [5]: logging.config.dictConfig(LOGGING)

In [6]: logger = logging.getLogger('default')

In [7]: 

In [7]: class Foo:
   ...:     def __str__(self):
   ...:         return 'test@email.com'
   ...: 

In [8]: logger.info('test@email.com - %s', Foo())
INFO REDACTED - test@email.com

Expected behavior
Text in the repr should be redacted if that is what is being logged