Performance: Remove slow php -l check and add progress indicator

Issues:
- Script was running php -l (syntax checker) on every file with 500 error
- With 7555 errors, this meant running php -l thousands of times
- Each php -l takes 100-500ms, causing multi-minute delays

Changes:
- Removed php -l syntax checking (was causing major slowdown)
- Added progress indicator showing "Analyzed X / Y errors..."
- Progress updates every 500 errors to show script is working
- Completion message when diagnosis finishes

Result: Diagnosis now completes in seconds instead of minutes.
Users still get comprehensive checks for .htaccess, permissions,
file existence, docroot, PHP handler, and WordPress issues.

modules/website/500-error-tracker.sh

@@ -190,9 +190,21 @@ DETAILED_DIAGNOSIS="$TEMP_DIR/detailed_diagnosis.txt"
 declare -A diagnosed_causes
 declare -A cause_examples
 
+total_to_diagnose=$(wc -l < "$ERRORS_500")
+current_line=0
+
+echo "Analyzing $total_to_diagnose errors for root causes..."
+echo ""
+
 while IFS='|' read -r domain user status url timestamp ip; do
     [ -z "$domain" ] && continue
 
+    ((current_line++))
+    # Show progress every 500 errors
+    if [ $((current_line % 500)) -eq 0 ]; then
+        echo -ne "\rAnalyzed $current_line / $total_to_diagnose errors..."
+    fi
+
     diagnosis=""
     cause="UNKNOWN"
     specific_file=""
@@ -397,15 +409,6 @@ while IFS='|' read -r domain user status url timestamp ip; do
                             cause="PERMISSION_ERROR"
                             diagnosis="$domain$url - File not readable: $specific_file (perms: $file_perms)"
                             issue_found="yes"
-                        else
-                            # Check for PHP syntax errors
-                            syntax_check=$(php -l "$specific_file" 2>&1)
-                            if [[ "$syntax_check" =~ "Parse error" ]] || [[ "$syntax_check" =~ "syntax error" ]]; then
-                                cause="PHP_SYNTAX_ERROR"
-                                syntax_line=$(echo "$syntax_check" | grep -oP "line \K[0-9]+" | head -1)
-                                diagnosis="$domain$url - PHP syntax error in $specific_file${syntax_line:+ at line $syntax_line}"
-                                issue_found="yes"
-                            fi
                         fi
                     fi
 
@@ -637,6 +640,9 @@ while IFS='|' read -r domain user status url timestamp ip; do
     fi
 done < "$ERRORS_500"
 
+echo -e "\rAnalyzed $total_to_diagnose / $total_to_diagnose errors - Complete!     "
+echo ""
+
 # Display diagnosed causes
 echo -e "${CYAN}${BOLD}ROOT CAUSES IDENTIFIED:${NC}"
 echo ""