Fix HIGH priority issues: library exit, unquoted paths, and globs

Fixed multiple HIGH severity issues found by QA scan:

1. Library exit usage (lib/http-attack-analyzer.sh):
   - Changed exit 1 to return 1
   - Libraries should return, not exit (would terminate caller)

2. Unquoted path expansions (9 fixes):
   - cleanup-toolkit-data.sh: Quoted $pattern in ls/rm commands
   - hardware-health-check.sh: Quoted /sys/block/$disk/queue paths
   - plesk-helpers.sh: Quoted /var/qmail/mailnames/$domain path
   - Prevents breakage with paths containing spaces

3. Unquoted globs in rm commands (3 fixes):
   - erase-toolkit-traces.sh: Quoted glob patterns
   - Prevents unintended file deletion from glob expansion

All changes improve robustness and prevent edge case failures.

lib/http-attack-analyzer.sh

@@ -9,7 +9,7 @@
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 source "$SCRIPT_DIR/attack-signatures.sh" 2>/dev/null || {
     echo "ERROR: attack-signatures.sh not found" >&2
-    exit 1
+    return 1
 }
 
 # Analyze a single HTTP request log line