feat(credentials): add GCP credential management (#7495)

[Gabriel Pezé (gabriel-peze)]

Proposed changes

• Add the GCP credentials management, with status

Testing Instructions

1. Create and update a credentials GCP
2. Check for the status

Related issues

• Relates feat(credentials): support GCP credential types and perform connectivity test #7495

[github-actions]

📖 Documentation check — ❌ Failed

40 functional file(s) changed, 0 documentation file(s) changed.

Blocking gaps

Update the docs or add the No need documentation label to bypass.

🟠 2 new endpoint(s) in existing controller

• File: openaev-api/src/main/java/io/openaev/api/credentials/CredentialApi.java
• Expected doc update: docs/docs/usage/rest-api.md
• Reason: New endpoints expand the API surface.

Suggestions (non-blocking)

• 🟡 New configuration property — openaev-api/src/main/java/io/openaev/secrets/provider/impl/validators/GcpCredentialConnectivityCheck.java → docs/docs/deployment/configuration.md

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Add the No need documentation label to bypass this check when no documentation update is needed.