Update for multi-survey

[JulienPeloton]

With the upcoming LSST, I should redesign the package to handle both ZTF & LSST. Users should be able to choose:

TOM_ALERT_CLASSES = [
  ...,
  'tom_fink.fink.FinkZtf',
  'tom_fink.fink.FinkLsst',
]

and idem for kafka:

ALERT_STREAMS = [
    {
        'ACTIVE': True,
        'NAME': 'tom_fink.alertstream.FinkLsstAlertStream',  # Name changed
        'OPTIONS': {
            'URL': os.getenv('FINK_CREDENTIAL_URL', 'set FINK_CREDENTIAL_URL value in environment'),
            'USERNAME': os.getenv('FINK_CREDENTIAL_USERNAME', 'set FINK_CREDENTIAL_USERNAME value in environment'),
            'GROUP_ID': os.getenv('FINK_CREDENTIAL_GROUP_ID', 'set FINK_CREDENTIAL_GROUP_ID value in environment'),
            'TOPIC': os.getenv('FINK_TOPIC', 'set FINK_TOPIC value in environment'),
            'MAX_POLL_NUMBER': os.getenv("FINK_MAX_POLL_NUMBER", 1e10),
            'TIMEOUT': os.getenv('FINK_TIMEOUT', 10),
            'TOPIC_HANDLERS': {
                'fink.stream': 'tom_fink.alertstream.alert_logger',
            },
        },
    },
]

[phycodurus]

Hi Julien, a high priority item for this month's TOMToolkit sprint (Feb, 2026) is to refactor the tom_fink broker into to our new DataServices architecture (some background here). I'm happy to incorporate these changes. Also, I'm happy to touch base with you about the refactor and, at the very least, I'll certainly include you on the resulting PR review.

[JulienPeloton]

Hello Lindy -- thanks for the follow-up!

Would it be easier for that I incorporate the change for LSST first and then you refactor all at once, or do you prefer to refactor what already exists, and then I extend for LSST? Let me know what's best for you.