Update API specifications with fern api update

[github-actions]

Update API specifications by running fern api update.

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Note

Medium Risk
Medium risk because this updates the public OpenAPI contract across many endpoints (new fields, stricter import schemas, and added 403 responses), which can break generated clients and consumers relying on previous schema/response shapes.

Overview
Refreshes openapi.json with several new/expanded public API contracts.

Adds OAuth consent audit action types (oauth-consent-grant/oauth-consent-deny) and extends action/session metadata with performedByClientId, plus UserSession.clientId and UserSession.landscapeId. Also expands various schemas: ADRs now include content, diagram description generation requests accept a new DiagramContentGenerateDescriptionFilter (including optional modelObjectIds), diagram image export supports maxWidth, and model object expansion can include flows via flowsExpanded.

Tightens import payload validation by setting additionalProperties: false on multiple *Import schemas and updates the parentId hierarchy rules for ModelObjectImport. Broadly annotates many endpoints with an explicit 403 Forbidden response and adjusts the Share Link endpoints so PATCH is the update operation (with optional resetShortId) and DELETE no longer takes a body.

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