deps: evaluate Oracle Linux 10 for OCI container base images

[ericfitz]

Summary

Dependabot PR #147 proposed bumping the Oracle Linux base image from 9-slim to 10-slim in Dockerfile.redis-oracle and Dockerfile.server-oracle. The PR was closed because this is a major OS version change that needs deliberate evaluation and testing.

Background

• Oracle Linux 10 was recently released
• Both Oracle Dockerfiles (Dockerfile.redis-oracle, Dockerfile.server-oracle) currently use OL 9 / 9-slim
• Dockerfile.redis-oracle builds Redis from source with system libraries
• Dockerfile.server-oracle compiles Go with CGO_ENABLED=1 for Oracle client support

Tasks

• Verify Oracle Instant Client availability and compatibility on OL 10
• Verify Oracle ADB wallet/mTLS connectivity works from OL 10 containers
• Build both Dockerfiles on OL 10 and verify successful compilation
• Run integration tests (make test-integration-oci) against OL 10-based containers
• Update LABEL security.oracle-linux metadata in both Dockerfiles
• Run container security scan (make scan-containers) and compare results vs OL 9
• Update any OL 9-specific package names or paths that changed in OL 10

References

• Closed PR: chore(docker): bump os/oraclelinux from 9-slim to 10-slim #147
• Oracle Linux 10 release notes: https://docs.oracle.com/en/operating-systems/oracle-linux/10/