feat: add subscription history API key permission from api-specifications#2411

[cursor]

Summary

Adds the public subscription_history.read API key permission introduced by api-specifications#2411. This implements DX-1028.

Spec-to-SDK mapping

Spec change	SDK files changed
Add subscription_history.read to the public API key permission union	src/enums/api-key/api-key-permission.ts
Accept and preserve the permission in API key webhook payloads	src/__tests__/mocks/notifications/api-key-updated.mock.ts (exercised by the shared notification parser test)
Document and version the additive public change	CHANGELOG.md, package.json (3.9.0)

Intentionally excluded

• No subscription-history resource was added because the endpoint implementation is tracked separately in DX-1026/api-specifications#2419.
• No notification types, entities, event classes, or exports changed because all five API key events already share ApiKeyPermission[] and pass the array through.
• Internal-only permissions and API key CRUD models remain excluded.

Validation

• pnpm install --frozen-lockfile — passed
• pnpm build — passed
• pnpm typecheck:tests — passed
• pnpm test --runInBand — 34 suites and 275 tests passed
• pnpm lint — passed

Created by an automated spec-sync agent.