feat(workflow-engine): Hook into organization creation signals

[leeandher]

Adds a new BetterSignal, and triggers it from the cell provisioning rpc for creating organizations. There is precedent for this with the terms_accepted signal, so it should be okay.

We're also adding the receiver, but it's gated by an option to be a noop on merge, we can control its rollout when we're ready.

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[linear-code]

ISWF-3209

[saponifi3d]

Yayyyy!!!! Looks great!

[leeandher]

dont git push -f while using gh stack i guess, broke something

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[cursor]

Unused detector workflow helper

Low Severity

connect_workflows_to_detector is added but never called. Connection is already done inside create_and_connect_pull_request_workflow via DetectorWorkflow.objects.create, so this helper is dead code that mirrors the unused parallel to connect_workflows_to_issue_stream.

 

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