Sette opp bedre alarm for autentiseringskomponenten

# Beskrivelse

https://github.com/Altinn/altinn-devops-postmortem/issues/67

## Definisjoner

Se #parentIssue

# Avklaringer

# Akseptansekriterier

# Bilder/Tegninger

# Oppgaver/Tasks

```[tasklist]
### Trusselmodellering
- [ ] Åpner denne endringen for mulige nye trusler eller misbruk?
```

```[tasklist]
### UX
- [ ] Add a draft title or issue reference here
```

```[tasklist]
### Frontend
- [ ] Add a draft title or issue reference here
```

```[tasklist]
### Backend
- [ ] Add a draft title or issue reference here
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```[tasklist]
### Dokumentasjon
- [ ] Add a draft title or issue reference here
```

```[tasklist]
### Test
- [ ] Add a draft title or issue reference here
```

Start by reading the linked postmortem issue (#67) and the authentication component's existing alarm setup. The issue does not identify files, tests, alarm conditions, or acceptance criteria, so clarify the required alert behavior and how completion will be verified before implementation.

Written by the indexing model from the issue text.