Fix: Remove 'local' keyword from global scope (CRITICAL)

CRITICAL FIXES:
- Line 164: Remove 'local' from memory_reduction variable (global scope)
- Line 173: Remove 'local' from has_traffic variable (global scope)

Issue: 'local' keyword can only be used inside function definitions.
Using 'local' in global scope causes 'local: can only be used in a function'
runtime error and script failure.

RESULTS:
- 2 CRITICAL issues fixed
- Script now runs without global scope errors

modules/performance/php-fpm-batch-analyzer.sh

@@ -161,7 +161,7 @@ while IFS= read -r username; do
         # Determine if optimization needed
         # Flag as YES if: different from current (increase or decrease)
         # AND has meaningful traffic (>= 5 concurrent) OR memory efficiency gain (> 20% reduction)
-        local memory_reduction=0
+        memory_reduction=0
         if [ "$recommended" -lt "$current" ]; then
             memory_reduction=$(( (current - recommended) * 100 / current ))
         fi
@@ -170,7 +170,7 @@ while IFS= read -r username; do
             # Check if change is meaningful:
             # 1. Has significant traffic (>= 5 concurrent requests)
             # 2. OR significant memory reduction (>= 20%)
-            local has_traffic=0
+            has_traffic=0
             [ "$peak" != "?" ] && [ "$peak" -ge 5 ] && has_traffic=1
 
             if [ "$has_traffic" = "1" ] || [ "$memory_reduction" -ge 20 ]; then