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:**
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PRRT_kwDOO6Hdxs5uu70e, PRRT_kwDOO6Hdxs5uu70i, PRRT_kwDOO6Hdxs5uu7zn,
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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/examples/disk-health.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+# Check disk health and temperatures
+# Quick overview of all disks with temperature warnings
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+QUERY_SCRIPT="$SCRIPT_DIR/../scripts/unraid-query.sh"
+
+QUERY='{ array { disks { name device temp status isSpinning } } }'
+
+echo "=== Disk Health Report ==="
+echo ""
+
+RESPONSE=$("$QUERY_SCRIPT" -q "$QUERY" -f raw)
+
+echo "$RESPONSE" | jq -r '.array.disks[] | "\(.name) (\(.device)): \(.temp)°C - \(.status) - \(if .isSpinning then "Spinning" else "Spun down" end)"'
+
+echo ""
+echo "Temperature warnings:"
+echo "$RESPONSE" | jq -r '.array.disks[] | select(.temp > 45) | "⚠️  \(.name): \(.temp)°C (HIGH)"'
+
+HOTTEST=$(echo "$RESPONSE" | jq -r '[.array.disks[].temp] | max')
+echo ""
+echo "Hottest disk: ${HOTTEST}°C"