Add Fast 500 Error Tracker + Fix awk error in analyzer

NEW SCRIPT: modules/website/500-error-tracker.sh
- FAST-ONLY 500 error detection (no menus, no options)
- Scans access logs for 500 errors
- Maps domains to cPanel usernames
- Automatically diagnoses root causes by checking error_log files
- Shows actual PHP errors causing the 500s

ROOT CAUSE DETECTION:
- PHP Memory Exhausted (shows current limit)
- PHP Fatal Errors
- PHP Syntax Errors
- Missing PHP Functions/Extensions
- Database Connection Failures
- .htaccess Issues
- Shows ACTUAL error examples, not just suggestions

FIXES:
- Fixed awk error in website-error-analyzer.sh:
  • Changed "next" in END block to "if (length > 0)"
  • "next" cannot be used in END block in awk

- Added option 2 in Website Management menu
- Renumbered all WordPress tools (3-16)

DIFFERENCE FROM FULL ANALYZER:
Full Analyzer: All errors, filters, time ranges, user choices
Fast Tracker: ONLY 500s, auto-diagnosis, shows WHY not suggestions

Use Fast Tracker when you need to quickly find which domains
are getting 500 errors and the exact PHP errors causing them.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

modules/website/website-error-analyzer.sh

@@ -604,9 +604,9 @@ END {
         file_path = file[key]
 
         # Skip empty errors
-        if (length(error) == 0) next
-
-        print count[key] "|" domain "|" file_path "|" error "|" root_cause
+        if (length(error) > 0) {
+            print count[key] "|" domain "|" file_path "|" error "|" root_cause
+        }
     }
 }' "$CRITICAL_ERRORS" | sort -t'|' -k1 -rn | head -20 | while IFS='|' read -r count domain file_path error_msg root_cause; do