Update API specifications with fern api update

[github-actions]

Update API specifications by running fern api update.

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Note

Medium Risk
Although this is a spec-only change, it modifies public API contracts (new schemas/fields, stricter import payload validation, new endpoint semantics, and many added 403 responses) which may require client and SDK updates.

Overview
Updates the OpenAPI spec to add OAuth consent auditing support, introducing oauth-consent-grant/oauth-consent-deny action types and related ActionOAuth* schemas, plus new audit/session fields like performedByClientId and UserSession.clientId/landscapeId.

Extends and tightens several API contracts: ADR objects now include markdown content, diagram image export supports maxWidth, and diagram description generation requests accept a new DiagramContentGenerateDescriptionFilter (with optional modelObjectIds). Model object expansion adds flows/flowsExpanded.

Makes import payload schemas stricter by setting additionalProperties: false across multiple *Import types and updates ModelObjectImport.parentId hierarchy rules. Adds documented 403 Forbidden responses across many endpoints, and adjusts /share-link to have a distinct PATCH update (with optional resetShortId) and DELETE operation definitions.

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