Pin OpenAI Model Snapshots to Prevent Prompt Regressions

OpenAI's official prompting guide recommends pinning production applications to a specific model snapshot (such as o1-2024-12-17) and building evaluations to measure prompt behavior across iterations and model upgrades.

CI/CD Audit Prompt: Scan all deployment manifests in <manifests>{{YAML}}</manifests> and flag any unpinned model alias so it can be locked to a dated snapshot prior to release.