feat: add Crush MCP server configurations and validate multiple MCP servers

- Add crush.json with comprehensive MCP configurations for Crush AI assistant
- Configure stdio-based MCPs: penpot, context7, docker, drawio, redmine
- Configure HTTP-based MCP: nextcloud (port 8083 with SSE endpoint)
- Fix mcp-redmine Dockerfile with correct python module entrypoint
- Fix nextcloud-mcp Dockerfile to handle .dockerignore blocking observability
- Fix drawio-mcp Dockerfile to use pnpm and correct build directory
- Update docker-compose.yml with proper MCP server configurations
- Add environment variable configuration for MCPs requiring external services
- Create MCP validation script to test servers with protocol messages
- Update STATUS.md with confirmed working MCP servers and their requirements
- Validate: penpot, context7, docker, drawio, redmine, nextcloud (HTTP)
- Document required env vars for ghost, imap, proxmox, penpot MCPs
- Configure Crush to use both stdio (docker run) and HTTP endpoints

docker-compose.yml

@@ -166,21 +166,21 @@ services:
   # Content Management (4 servers)
   # ==========================================
 
-  # Nextcloud MCP - 90+ tools across 8 apps
+  # Nextcloud MCP - 90+ tools across 8 apps (HTTP-based)
   nextcloud-mcp:
     image: kneldevstack-aimiddleware-nextcloud-mcp
     build:
       context: ./vendor/nextcloud-mcp-server
-      dockerfile: Dockerfile
+      dockerfile: ../../dockerfiles/nextcloud-mcp/Dockerfile
     container_name: kneldevstack-aimiddleware-nextcloud-mcp
     restart: unless-stopped
+    ports:
+      - "8083:8000"
     environment:
       - PYTHONUNBUFFERED=1
       - NEXTCLOUD_HOST=${NEXTCLOUD_HOST}
       - NEXTCLOUD_USERNAME=${NEXTCLOUD_USERNAME}
-      - NEXTCLOUD_APP_PASSWORD=${NEXTCLOUD_APP_PASSWORD}
-    ports:
-      - "8083:8080"
+      - NEXTCLOUD_PASSWORD=${NEXTCLOUD_PASSWORD}
     profiles:
       - ops
 
@@ -348,18 +348,18 @@ services:
       - ops
 
   # Redmine MCP - Project management
+  # NOTE: This is a stdio-based MCP server, run on-demand by Crush via docker run
   mcp-redmine:
     image: kneldevstack-aimiddleware-mcp-redmine
     build:
       context: ./vendor/mcp-redmine
-      dockerfile: Dockerfile
+      dockerfile: ../../dockerfiles/mcp-redmine/Dockerfile
     container_name: kneldevstack-aimiddleware-mcp-redmine
-    restart: unless-stopped
+    restart: "no"
     environment:
       - PYTHONUNBUFFERED=1
       - REDMINE_URL=${REDMINE_URL}
       - REDMINE_API_KEY=${REDMINE_API_KEY}
-    command: ["uvx", "mcp-redmine"]
     profiles:
       - ops