fix(openapi): webhook audience filtering in OpenAPI v3 importer

[devin-ai-integration]

Description

Fixes an issue where webhooks with x-fern-audiences were not showing up in docs when generating for matching audiences.

Requested by Catherine Deskur

Changes Made

• Fixed the filterIrForAudiences method in AbstractSpecConverter.ts to correctly filter individual webhooks within each group, rather than filtering entire webhook groups by their group ID
• Added webhook-audience test fixture to verify webhooks with x-fern-audiences are correctly parsed and processed
• Added ir-to-jsonschema snapshots for the new fixture
• Added Swift SDK snapshot for the new fixture
• Added webhook-audience to Ruby SDK allowedFailures (Ruby SDK uses IR v61 which doesn't support the newer IR format)
• Updated CLI versions.yml with changelog entry for version 3.42.2

Root Cause

The original code was comparing webhook group IDs (the map keys in ir.webhookGroups) against individual webhook IDs (stored in filteredWebhooks). These are different values, so the filter would never match, causing all webhooks with audiences to be filtered out.

The Fix

Changed from filtering groups by group ID:

Object.entries(ir.webhookGroups).filter(([webhookId]) => filteredWebhooks.has(webhookId))

To filtering individual webhooks within each group:

Object.entries(ir.webhookGroups).map(([webhookGroupId, webhookGroup]) => {
    const filteredWebhookGroup = webhookGroup.filter(
        (webhook) => webhook.id != null && filteredWebhooks.has(webhook.id)
    );
    return [webhookGroupId, filteredWebhookGroup];
})

This aligns with the correct implementation in filterIntermediateRepresentationForAudiences.ts (lines 52-70).

Testing

• Lint checks pass
• Added webhook-audience test fixture with webhooks using x-fern-audiences (public, private, and no audience)
• Seed test passes for ts-sdk generator
• ir-to-jsonschema snapshot tests pass
• Swift SDK snapshot tests pass
• Ruby SDK added to allowedFailures (expected - uses older IR version)

Human Review Checklist

• Verify the fix aligns with the similar implementation in packages/commons/ir-utils/src/filtered-ir/filterIntermediateRepresentationForAudiences.ts
• Note: The test fixture validates webhook parsing but seed tests run with audiences: { type: "all" }, so the filtering code path itself isn't directly exercised by the fixture

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[devin-ai-integration]

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