Disable playwright and puppeteer MCP servers

These resource-intensive browser automation servers are disabled:
- playwright-mcp: Requires 2Gi memory, complex persistence setup
- puppeteer-mcp: Similar resource requirements

This allows the remaining 13 MCP servers to deploy successfully:
✓ mcp-gateway, n8n-mcp, kubernetes-mcp, github-mcp, gitea-mcp
✓ postgresql-mcp, sqlite-mcp, prometheus-mcp, slack-mcp, s3-mcp
✓ filesystem-mcp, fetch-mcp, memory-mcp

Can re-enable later with proper persistence configuration.

platform/mcp-servers/helmrelease.yaml

@@ -28,6 +28,13 @@ spec:
     cleanupOnFail: true
 
   values:
+    # Disable resource-intensive servers
+    playwright-mcp:
+      enabled: false
+    puppeteer-mcp:
+      enabled: false
+
+    # Configure enabled servers with secrets
     mcp-gateway:
       gateway:
         auth:
@@ -40,12 +47,6 @@ spec:
       n8nMCP:
         n8n:
           apiKey: "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIyNWI4Njk4My0wOWQzLTRjMzAtOWQ0OC03OWQxOWMxZjc5Y2UiLCJpc3MiOiJuOG4iLCJhdWQiOiJwdWJsaWMtYXBpIiwiaWF0IjoxNzYzMDk2NDU4fQ.I9MhQ1THxAD-P4mfcZAl3qxpjoIYM61OD1BIILDyPUw"
-    playwright-mcp:
-      persistence:
-        enabled: true
-        downloadSize: 10Gi
-        screenshotSize: 10Gi
-        storageClassName: nfs-client
     github-mcp:
       github:
         token: "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"