- Rename apps/base/postfix → apps/base/mailgateway
- Rename apps/overlays/au-syd1/postfix → apps/overlays/au-syd1/mailgateway
- Namespace postfix → mailgateway throughout all resources
- Replace boky/postfix with tozd/postfix:alpine-322 (Postfix 3.10.2 on Alpine 3.22)
- Add full main.cf and master.cf as ConfigMap resources mounted via subPath
- main.cf: relay-only gateway config, texthash: transport maps, rspamd milter
- master.cf: standard smtp + submission (587, TLS required) + internal processes
- Remove custom.cf (superseded by main.cf); merge transport into postfix-config ConfigMap
- MAILNAME/MY_NETWORKS/MY_DESTINATION env vars kept in sync with main.cf
- LOG_TO_STDOUT=1 for k8s log collection
- Vault DKIM keys now at kubernetes/namespace/mailgateway/default/dkim-keys
- artifactapi: replace boky/postfix with tozd/postfix in dockerhub cache
- postfix namespace with Deployment + HPA (2-6 replicas)
- rspamd Deployment + HPA (2-6 replicas) with milter interface
- postfix configured to relay inbound mail to stalwart via transport maps
- rspamd milter on port 11332 for spam scanning and DKIM signing
- DKIM keys stored in Vault at kubernetes/namespace/postfix/default/dkim-keys
- TLS cert via cert-manager (vault-issuer) for mail.main.unkin.net
- rspamd web UI exposed via Traefik Gateway at rspamd.k8s.syd1.au.unkin.net
- postfix external LoadBalancer service for inbound MX on port 25
- artifactapi: add boky/postfix and rspamd/rspamd to dockerhub cache
## Summary
- Adds \`^hashicorp/consul\` and \`^hashicorp/vault\` to the dockerhub immutable_patterns in artifactapi's remote-docker.yaml
- Replaces the more specific \`^hashicorp/vault-secrets-operator\` pattern since \`^hashicorp/vault\` subsumes it
- Required for the benvin/vault and benvin/consul branches (vault:2.0.1 and consul:1.22.7)
## Test plan
- [ ] Verify artifactapi accepts requests for hashicorp/vault and hashicorp/consul images after merge
Reviewed-on: #147
Split monolithic remotes.yaml into per-type-package files under
resources/conf.d/ to align with artifactapi v2.7.1 directory loading.
Updated schema: virtuals/locals use dedicated top-level keys, type field
removed. Added helm remotes for all kustomize helmCharts repos and
OCI patterns to docker remotes. CONFIG_PATH now points to the directory.
Reviewed-on: #92
unkinben