chore(8.19): release 8.19.4

[elastic-vault-github-plugin-prod]

🤖 I have created a release beep boop

8.19.4 (2026-03-10)

Features

• Add functional options pattern for client instantiation (#1321) (7561adf)

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[github-actions]

apidiff: module (vs v8.19.3)

Ignoring internal package github.com/elastic/go-elasticsearch/v8/internal/version
Ignoring internal package github.com/elastic/go-elasticsearch/v8/internal/version
Incompatible changes:
- ./esapi.Version: value changed from "8.19.3" to "8.19.4"
- Version: value changed from "8.19.3" to "8.19.4"
Compatible changes:
- New: added
- NewBase: added
- NewTyped: added
- Option: added
- WithAPIKey: added
- WithAddresses: added
- WithBasicAuth: added
- WithCACert: added
- WithCertificateFingerprint: added
- WithCloudID: added
- WithCompatibilityMode: added
- WithCompression: added
- WithDisableMetaHeader: added
- WithDiscoverNodesOnStart: added
- WithInstrumentation: added
- WithLogger: added
- WithRetry: added
- WithServiceToken: added
- WithTransportOptions: added