Field value of `Fields.event.time` and `bug.creation_time` in logs are received as `datetime.datetime(2024, 4, 9, 15, 39, 56)` instead of ISO format

[leplatrem]

[alexcottner]

This appears to be coming from dockerflow's json formatter. I have a unit test going over there that confirms the problem. Will open an issue.

[alexcottner]

Oh, there is already an issue there. mozilla-services/python-dockerflow#10

[alexcottner]

Looking at this a bit more, this is more complicated than I'd like. But I think we have a few options:

1. In JBI, and everywhere that we want to output dates to logs, we explicitly do dateprop.isoformat() when creating the log record
2. In dockerflow, we add another JSON log formatter class called "JsonPrettyLogFormatter" that checks for specific object types and applies special formatting. Would require people to move over if they want this.
3. In dockerflow, we extend the SafeJSONEncoder method with something like the options below. But this could be a breaking change for somebody.

# option 1, explicit but requires more code
class SafeJSONEncoder(json.JSONEncoder):
    def default(self, o):
        if isinstance(o, datetime.datetime):
            return o.isoformat()
        if isinstance(o, datetime.date):
            return o.isoformat()
        if isinstance(o, datetime.time):
            return o.isoformat()
        return repr(o)

# option 2, lazy but would work across multiple object types
class SafeJSONEncoder(json.JSONEncoder):
    def default(self, o):
        if hasattr(o, 'isoformat') and callable(o.isoformat):
            return o.isoformat()
        return repr(o)