Change DialogStatus values

[oskogstad]

Introduction

We change the list of dialog statuses to better reflect the distinct states of a dialog

Originally discussed in https://altinndevops.slack.com/archives/C05V9GB6QAJ/p1716280974809599 and described as part of this memo: https://digdir-my.sharepoint.com/:w:/r/personal/bjorn_dybvik_langfors_digdir_no/Documents/Prosjekter/Dialogporten/20240529%20Svar%20pa%CC%8A%20sp%C3%B8rsma%CC%8Al%20fra%20Skatt.docx?d=w9b9b7f622d514754b891294dcb7259ec&csf=1&web=1&e=0ESaca (the relevant parts of which are included below)

Description

Status Code	Explanation	Displayed in
New	As today (default), not started. Will be used for Altinn Correspondence.	Inbox
InProgress	Started. In a serial process, this is used to indicate that, for example, a form filling is ongoing. "The ball" is with the user.	In progress
Signing	Equivalent to "InProgress", but will be used by the workspace/frontend for display purposes.	In progress
Processing	For processing by the service owner. In a serial process, this is used after a submission is made. "The ball" is with the service owner. The user usually does not need to do anything here, except to be able to abort the process (if the service owner exposes an action for it).	Sent
RequiresAttention	New. Used to indicate that the dialogue is in progress/under work, but is in a state where the user must do something - for example, correct an error, or other conditions that hinder further processing. We will pull the dialogue up into the inbox again, and potentially place it over dialogues with status "New".	Inbox
Completed	The dialogue has reached its natural endpoint, but not necessarily a final one. The dialogue may have actions for "Send complaint" or "Send correction", which the user can initiate and that can take it back to "InProgress" again. If the service owner needs to reopen the case due to an error, the status can be set to "RequiresAction".	Sent (1)

(1) We need to define rules in arbeidsflate to temporarily move this to "Inbox" to make it clearer to users that the dialogue has reached a (temporary) conclusion, for example, with a decision letter issued. A possible solution is to display these above all "New" in the inbox if the authenticated user has not registered as seen/logged in since the last change.

Tasks

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1. Implementation tasks are added here
2. Prepare documentation (if relevant - either update working document, or add a new file in docs)
3. Add e2e-test (if relevant)

Threat modelling

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1. Does this change introduce any potential security issues?

Acceptance criteria

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