Add Helm chart and GitLab CI pipeline

- Helm chart with PostgreSQL, MinIO, Redis as optional subcharts
- Production and external infrastructure value files
- HPA, Ingress, and health probe support
- GitLab CI pipeline using Buildah for container builds
- Multi-stage pipeline: test, build, publish

helm/orchard/Chart.yaml

@@ -0,0 +1,29 @@
+apiVersion: v2
+name: orchard
+description: Content-Addressable Storage System for binary artifacts
+type: application
+version: 0.1.0
+appVersion: "1.0.0"
+keywords:
+  - artifact-storage
+  - content-addressable
+  - binary-storage
+  - package-registry
+home: https://git.bitstorm.ca/bitforge/orchard
+sources:
+  - https://git.bitstorm.ca/bitforge/orchard
+maintainers:
+  - name: BitForge
+dependencies:
+  - name: postgresql
+    version: "15.5.x"
+    repository: https://charts.bitnami.com/bitnami
+    condition: postgresql.enabled
+  - name: minio
+    version: "14.x.x"
+    repository: https://charts.bitnami.com/bitnami
+    condition: minio.enabled
+  - name: redis
+    version: "19.x.x"
+    repository: https://charts.bitnami.com/bitnami
+    condition: redis.enabled