fix(ci): add Helm repository setup to chart release workflow

The chart-releaser was failing because it couldn't resolve the
dependencies (Qdrant and Ollama subcharts) when packaging.

Changes:
- Add azure/setup-helm action to install Helm v3.16.0
- Add step to add Qdrant and Ollama Helm repositories
- Run helm dependency update before chart-releaser runs

This fixes the error:
"Error: no repository definition for https://qdrant.github.io/qdrant-helm, https://otwld.github.io/ollama-helm"

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.github/workflows/helm-release.yml

@@ -24,6 +24,18 @@ jobs:
           git config user.name "$GITHUB_ACTOR"
           git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
 
+      - name: Install Helm
+        uses: azure/setup-helm@v4.3.0
+        with:
+          version: v3.16.0
+
+      - name: Add Helm repositories and update dependencies
+        run: |
+          helm repo add qdrant https://qdrant.github.io/qdrant-helm
+          helm repo add ollama https://otwld.github.io/ollama-helm
+          helm repo update
+          helm dependency update charts/nextcloud-mcp-server
+
       - name: Run chart-releaser
         uses: helm/chart-releaser-action@cae68fefc6b5f367a0275617c9f83181ba54714f # v1.7.0
         env: