CNF-16727: improve alarms notification reliability with an outbox and event-driven with pg listen/notify

[pixelsoccupied]

• alarms events are now handled with a transaction outbox table. this allows us to make sure every change is detected and handled as a unique notification, improving overall reliability
• each outbox entry will now trigger a function automatically with PG listen/notify feature to forward the notifications, adhering to more event-driven design
• new set of manager functions exposed to easily register listen/notify functions

[openshift-ci]

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[pixelsoccupied]

/test

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[pixelsoccupied]

/test all

[openshift-ci-robot]

@pixelsoccupied: This pull request references CNF-16727 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the story to target the "4.19.0" version, but no target version was set.

In response to this:

• alarms events are now handled with a transaction outbox table. this allows us to make sure every change is detected and handled as a unique notification, improving overall reliability
• each outbox entry will now trigger a function automatically with PG listen/notify feature to forward the notifications, adhering to more event-driven design
• new set of manager functions exposed to easily register listen/notify functions

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[pixelsoccupied]

/cc @alegacy
/uncc @edcdavid
/uncc @irinamihai

[alegacy]

Mostly minor comments; otherwise, looks great!

[pixelsoccupied]

/label tide/merge-method-rebase
/cc @alegacy

should be good for another pass!

[pixelsoccupied]

/remove-label tide/merge-method-rebase

[alegacy]

/lgtm
/approve

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