Configure MCP servers to use Harbor OCI registry

- Updated Chart.yaml dependencies to use OCI registry
- Added HelmRepository resource for Harbor
- Created Harbor registry secret (SOPS-encrypted)
- Updated HelmRelease to use HelmRepository instead of Git source
- Packaged and pushed all 16 MCP charts to Harbor OCI registry
- Updated .sops.yaml to handle platform secrets

All MCP charts are now available at:
oci://images.caffeinetux.com/mcp-charts

platform/mcp-servers/Chart.yaml

@@ -19,61 +19,61 @@ sources:
 dependencies:
   - name: mcp-gateway
     version: "1.0.0"
-    repository: "file://../mcp-gateway"
+    repository: "oci://images.caffeinetux.com/mcp-charts"
     condition: mcp-gateway.enabled
   - name: n8n-mcp
     version: "1.0.0"
-    repository: "file://../n8n-mcp"
+    repository: "oci://images.caffeinetux.com/mcp-charts"
     condition: n8n-mcp.enabled
   - name: playwright-mcp
     version: "1.0.0"
-    repository: "file://../playwright-mcp"
+    repository: "oci://images.caffeinetux.com/mcp-charts"
     condition: playwright-mcp.enabled
   - name: kubernetes-mcp
     version: "1.0.0"
-    repository: "file://../kubernetes-mcp"
+    repository: "oci://images.caffeinetux.com/mcp-charts"
     condition: kubernetes-mcp.enabled
   - name: github-mcp
     version: "1.0.0"
-    repository: "file://../github-mcp"
+    repository: "oci://images.caffeinetux.com/mcp-charts"
     condition: github-mcp.enabled
   - name: postgresql-mcp
     version: "1.0.0"
-    repository: "file://../postgresql-mcp"
+    repository: "oci://images.caffeinetux.com/mcp-charts"
     condition: postgresql-mcp.enabled
   - name: sqlite-mcp
     version: "1.0.0"
-    repository: "file://../sqlite-mcp"
+    repository: "oci://images.caffeinetux.com/mcp-charts"
     condition: sqlite-mcp.enabled
   - name: prometheus-mcp
     version: "1.0.0"
-    repository: "file://../prometheus-mcp"
+    repository: "oci://images.caffeinetux.com/mcp-charts"
     condition: prometheus-mcp.enabled
   - name: slack-mcp
     version: "1.0.0"
-    repository: "file://../slack-mcp"
+    repository: "oci://images.caffeinetux.com/mcp-charts"
     condition: slack-mcp.enabled
   - name: s3-mcp
     version: "1.0.0"
-    repository: "file://../s3-mcp"
+    repository: "oci://images.caffeinetux.com/mcp-charts"
     condition: s3-mcp.enabled
   - name: filesystem-mcp
     version: "1.0.0"
-    repository: "file://../filesystem-mcp"
+    repository: "oci://images.caffeinetux.com/mcp-charts"
     condition: filesystem-mcp.enabled
   - name: puppeteer-mcp
     version: "1.0.0"
-    repository: "file://../puppeteer-mcp"
+    repository: "oci://images.caffeinetux.com/mcp-charts"
     condition: puppeteer-mcp.enabled
   - name: fetch-mcp
     version: "1.0.0"
-    repository: "file://../fetch-mcp"
+    repository: "oci://images.caffeinetux.com/mcp-charts"
     condition: fetch-mcp.enabled
   - name: memory-mcp
     version: "1.0.0"
-    repository: "file://../memory-mcp"
+    repository: "oci://images.caffeinetux.com/mcp-charts"
     condition: memory-mcp.enabled
   - name: gitea-mcp
     version: "1.0.0"
-    repository: "file://../gitea-mcp"
+    repository: "oci://images.caffeinetux.com/mcp-charts"
     condition: gitea-mcp.enabled