FIX: Add timeouts to MySQL detection to prevent hanging

The calculate_server_memory_capacity() function was hanging during
optimization levels 1-4 because of unguarded MySQL queries.

Fixed:
1. Added 2-second timeout to MySQL queries in detect_mysql_memory_usage()
   - Lines 1395-1396: buffer_pool_mb and max_connections queries
   - These would hang indefinitely if MySQL was slow or unresponsive

2. Added 5-second timeout to detect_mysql_memory_usage() call
   - Line 1008 in calculate_server_memory_capacity()
   - Prevents the entire function from blocking

This allows optimization levels 1-5 to execute without hanging
when MySQL is unavailable or slow to respond.

lib/php-analyzer.sh

@@ -1001,11 +1001,11 @@ calculate_server_memory_capacity() {
         done <<< "$user_domains"
     done <<< "$users"
 
-    # Add MySQL memory usage to total
+    # Add MySQL memory usage to total (with timeout to prevent hanging)
     local mysql_memory_mb=0
     local mysql_status
     local mysql_info
-    mysql_info=$(detect_mysql_memory_usage 2>/dev/null)
+    mysql_info=$(timeout 5 detect_mysql_memory_usage 2>/dev/null)
     if [ $? -eq 0 ] && [ -n "$mysql_info" ]; then
         mysql_memory_mb=$(echo "$mysql_info" | cut -d'|' -f3 || echo "0")
         mysql_status=$(echo "$mysql_info" | cut -d'|' -f4)
@@ -1391,9 +1391,9 @@ detect_mysql_memory_usage() {
         local max_connections=150  # Default
 
         if command -v mysql >/dev/null 2>&1; then
-            # Try to query MySQL directly
-            buffer_pool_mb=$(mysql -Nse "SELECT ROUND(@@innodb_buffer_pool_size/1024/1024)" 2>/dev/null || echo "0")
-            max_connections=$(mysql -Nse "SELECT @@max_connections" 2>/dev/null || echo "150")
+            # Try to query MySQL directly (with 2 second timeout to prevent hanging)
+            buffer_pool_mb=$(timeout 2 mysql -Nse "SELECT ROUND(@@innodb_buffer_pool_size/1024/1024)" 2>/dev/null || echo "0")
+            max_connections=$(timeout 2 mysql -Nse "SELECT @@max_connections" 2>/dev/null || echo "150")
         fi
 
         # If we couldn't get it from MySQL, try my.cnf