Implement Structured Audit Logging

Create comprehensive logging that records every certificate operation in a structured format. Include correlation IDs to track requests across services, and implement log retention policies for compliance and debugging.

Start by locating the certificate-operation entry points and any existing logging configuration in the Go repository. Determine how correlation IDs can span services and where retention policies would be configured; done means every certificate operation emits structured, traceable logs with a defined compliance retention policy.

Written by the indexing model from the issue text.