fix(gcp-metadata): detect Cloud Run worker pools as serverless

[LucasLeao18]

Problema

isGoogleCloudServerless() (gcp-metadata) não reconhece Cloud Run Worker Pools: só checa CLOUD_RUN_JOB, FUNCTION_NAME e K_SERVICE. Com apenas CLOUD_RUN_WORKER_POOL setado, retorna false quando deveria retornar true. Inclui reprodução mínima na issue.

Solução

• core/packages/gcp-metadata/src/gcp-residency.ts: adiciona process.env.CLOUD_RUN_WORKER_POOL à checagem, com comentário/doc-link no padrão existente.
• test/utils/gcp-residency.ts: inclui a nova variável em removeServerlessEnvironmentVariables() para manter o helper consistente.
• test/gcp-residency.test.ts: novo caso should return true if CLOUD_RUN_WORKER_POOL env is set.

Validação

• npm run compile (tsc) limpo.
• Novo teste falha sem o fix e passa com o fix.
• Suíte completa do pacote: 69 passing, 0 failing.
• Reprodução da issue (env simulado via gist): isGoogleCloudServerless() retorna true.
• Prettier limpo nos arquivos alterados.

Referência

Fixes #9225

[google-cla]

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[gemini-code-assist]

Code Review

This pull request updates the isGoogleCloudServerless function in gcp-residency.ts to include the CLOUD_RUN_WORKER_POOL environment variable when detecting if the application is running in a Google Cloud Serverless environment. It also adds corresponding unit tests and updates the test utility to clean up this environment variable. There are no review comments, and I have no feedback to provide.