Add alerts task

This peels off the work in !852 (merged) related to the alert task specifically (as opposed to plugging the alerts task into the orchestrator).

I've bumped the version of fastavro to be at least 1.6.1, because 1.6.0 adds support for a strict option in the validate function that we use in the validation unit test, and 1.6.1 fixes a bug in that strict option.

requested review from @leo-singer

added 4 commits

• 1e0fd595...cc4a2174 - 3 commits from branch emfollow:main
• 25fd307a - Add alerts task

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• be041d81 - Add alerts task

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• d3edfcc0 - Rework download external event file so its done in a canvas

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• 1d61ae85 - Adjust task decorators

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• 578c480e - Remove leftover debugging print statement
• 089ca294 - Change kafka_topic_up from flag to method on KafkaWriter, remove periodic task

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• f44a886a - Update nagios and nagios unit test

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• c14d68df - Change send_after_downloading_skymap from task to function

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• 5a908d12 - Rename send_after_downloading_skymap to download_skymap_and_send_alert, rename

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• 995bbcca - Rename send_after_downloading_skymap to download_skymap_and_send_alert, rename

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• f49fb201 - Move download of external event into _add_external_coinc_to_alert

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approved this merge request

resolved all threads

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• ca28187f - Change _create_base_alert_dict from task to function

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• 71cc7172 - Drop task decorator on _create_base_alert_dict

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• 328257b5 - Fix thinko in get_event call in _add_external_coinc_to_alert

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• 87d0da4c - Drop identity task from send

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• 3481a9dc - Clean up send

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resolved all threads

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• 2a4dbc4e - Rework download_skymap_and_send_alert function to drop identity task. Change

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approved this merge request

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• 864343ce - Add alerts task

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enabled an automatic merge when the pipeline for 864343ce succeeds

merged

mentioned in merge request !852 (merged)