fix: address 18 CRITICAL+HIGH PR review comments

**Critical Fixes (7 issues):**
- Fix GraphQL schema field names in users tool (role→roles, remove email)
- Fix GraphQL mutation signatures (addUserInput, deleteUser input)
- Fix dict(None) TypeError guards in users tool (use `or {}` pattern)
- Fix FastAPI version constraint (0.116.1→0.115.0)
- Fix WebSocket SSL context handling (support CA bundles, bool, and None)
- Fix critical disk threshold treated as warning (split counters)

**High Priority Fixes (11 issues):**
- Fix Docker update/remove action response field mapping
- Fix path traversal vulnerability in log validation (normalize paths)
- Fix deleteApiKeys validation (check response before success)
- Fix rclone create_remote validation (check response)
- Fix keys input_data type annotation (dict[str, Any])
- Fix VM domain/domains fallback restoration

**Changes by file:**
- unraid_mcp/tools/docker.py: Response field mapping
- unraid_mcp/tools/info.py: Split critical/warning counters
- unraid_mcp/tools/storage.py: Path normalization for traversal protection
- unraid_mcp/tools/users.py: GraphQL schema + null handling
- unraid_mcp/tools/keys.py: Validation + type annotations
- unraid_mcp/tools/rclone.py: Response validation
- unraid_mcp/tools/virtualization.py: Domain fallback
- unraid_mcp/subscriptions/manager.py: SSL context creation
- pyproject.toml: FastAPI version fix
- tests/*: New tests for all fixes

**Review threads resolved:**
PRRT_kwDOO6Hdxs5uu70L, PRRT_kwDOO6Hdxs5uu70O, PRRT_kwDOO6Hdxs5uu70V,
PRRT_kwDOO6Hdxs5uu70e, PRRT_kwDOO6Hdxs5uu70i, PRRT_kwDOO6Hdxs5uu7zn,
PRRT_kwDOO6Hdxs5uu7z_, PRRT_kwDOO6Hdxs5uu7sI, PRRT_kwDOO6Hdxs5uu7sJ,
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PRRT_kwDOO6Hdxs5uu7Tr, PRRT_kwDOO6Hdxs5uu7Ts, PRRT_kwDOO6Hdxs5uu7Tu,
PRRT_kwDOO6Hdxs5uu7Tv, PRRT_kwDOO6Hdxs5uu7Tw, PRRT_kwDOO6Hdxs5uu7Tx

All tests passing.

Co-authored-by: docker-fixer <agent@pr-fixes>
Co-authored-by: info-fixer <agent@pr-fixes>
Co-authored-by: storage-fixer <agent@pr-fixes>
Co-authored-by: users-fixer <agent@pr-fixes>
Co-authored-by: config-fixer <agent@pr-fixes>
Co-authored-by: websocket-fixer <agent@pr-fixes>
Co-authored-by: keys-rclone-fixer <agent@pr-fixes>
Co-authored-by: vm-fixer <agent@pr-fixes>

skills/unraid/setup.sh

@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+# Setup script for Unraid MCP Plugin
+# Installs the MCP server dependencies
+
+set -euo pipefail
+
+PLUGIN_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "$PLUGIN_ROOT/../.." && pwd)"
+
+echo "=== Unraid MCP Plugin Setup ==="
+echo ""
+echo "Plugin root: $PLUGIN_ROOT"
+echo "Project root: $PROJECT_ROOT"
+echo ""
+
+# Check if uv is installed
+if ! command -v uv &> /dev/null; then
+    echo "Error: 'uv' is not installed."
+    echo "Install it with: curl -LsSf https://astral.sh/uv/install.sh | sh"
+    exit 1
+fi
+
+echo "✓ uv is installed"
+
+# Navigate to project root and install dependencies
+cd "$PROJECT_ROOT"
+
+echo "Installing Python dependencies..."
+uv sync
+
+echo ""
+echo "✓ Setup complete!"
+echo ""
+echo "Configure your Unraid server by setting these environment variables:"
+echo "  export UNRAID_API_URL='http://your-unraid-server/graphql'"
+echo "  export UNRAID_API_KEY='your-api-key'"
+echo ""
+echo "Test the MCP server with:"
+echo "  uv run unraid-mcp-server"