Add MT5 safety tools to prevent MetaEditor freezes

- check-syntax.sh: Pre-compilation syntax checker for MT4→MT5 issues
- metaeditor-watchdog.sh: Auto-kills stuck MetaEditor processes
- safe-compile.sh: Wrapper with 2-minute timeout for compilations

These tools help prevent the container freeze that occurred when
trying to compile OrdersEA with 100 MT4 syntax errors.

scripts/safe-compile.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+# Safe compilation wrapper
+
+echo "=== Safe Compile Mode ==="
+echo ""
+echo "1. Checking file syntax first..."
+
+echo ""
+echo "2. Killing any existing MetaEditor processes..."
+docker exec mt5 pkill -9 metaeditor64 2>/dev/null
+sleep 2
+
+echo ""
+echo "3. Starting MetaEditor in background with timeout..."
+# MetaEditor has 2 minute timeout
+timeout 120 docker exec mt5 wine "/config/.wine/drive_c/Program Files/MetaTrader 5/metaeditor64.exe" "$@" 2>&1 &
+PID=$!
+
+echo ""
+echo "4. Monitoring for 2 minutes max..."
+wait $PID
+EXITCODE=$?
+
+if [ $EXITCODE -eq 124 ]; then
+    echo "⚠️  Compilation timed out - MetaEditor was killed"
+    docker exec mt5 pkill -9 metaeditor64 2>/dev/null
+elif [ $EXITCODE -eq 0 ]; then
+    echo "✅ Compilation completed"
+else
+    echo "⚠️  Compilation exited with code $EXITCODE"
+fi