Update API specifications with fern api update

[github-actions]

Update API specifications by running fern api update.

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Note

Medium Risk
Primarily a generated OpenAPI spec update, but it changes request/response contracts (new fields, stricter additionalProperties: false, and added 403 responses) which can impact SDK generation and client integrations.

Overview
Updates openapi.json to extend the audit/action model with OAuth consent events (oauth-consent-grant/oauth-consent-deny) and new actor metadata (performedByClientId), plus adds OAuth session fields (UserSession.clientId/landscapeId).

Expands several schemas and endpoints: ADRs now include full markdown content; diagram description generation accepts a filter object (type + optional modelObjectIds) and image export gains maxWidth; model object expansion adds flows/flowsExpanded; import payload schemas become stricter via additionalProperties: false and clarify group parenting rules.

Many endpoints now explicitly document 403 Forbidden responses, and the Share Link path definition is reorganized while keeping create/update/delete operations documented.

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