CI workflows (placeholder)

Not yet functional — filled in during Phase 6. Deployment is GitOps via the team's existing ArgoCD instance (see infra/argocd/ and docs/adr/0002-argocd-gitops.md) — CI never runs kubectl/helm against a cluster directly. Planned workflows:

ai-service-ci.yml — lint/test/build/push image for apps/ai-service
node-services-ci.yml — lint/test/build for the NestJS services
web-ci.yml — lint/test/build for apps/web
ingestion-ci.yml — lint/test for the ingestion pipeline
bump-image-tag.yml — on image push, updates the image tag in the relevant infra/helm/medical-chatbot/values-<env>.yaml and commits/pushes that change; ArgoCD picks it up from there