Port PR from PBC-Java: Core: Extend secondary cache support with optional security header

[cross-repo-issue-creation]

A PR was merged over on PBC-Java

• Core: Extend secondary cache support with optional security header prebid-cache-java#159
• timestamp: 2025-03-20T13:51:42Z

[bsardo]

Go does not have secondary cache support at this time. Closing.