- replace interface{} with any across ~30 files for Go 1.18+ style
- adopt for-range-over-int loops in place of explicit index loops
- use maps.Copy from stdlib to replace manual map copy loops
- use min() builtin for exponential backoff delay cap in retry_manager
- add MongoDB 7.0 K8s manifests (StatefulSet, Service, PVC, Secret)
- document PostgreSQL and MongoDB deploy steps in deploy.md with SSH tunnel port mappings
- add split PostgreSQL K8s manifests for ConfigMap, Service, PVC, and StatefulSet
- expose PostgreSQL through NodePort for local Minikube access
- replace deploy.md LaTeX text syntax with Markdown inline code formatting
- keep deployment documentation rendering stable in Wiki.js and Markdown viewers