CRITICAL FIXES: Apply essential improvements from beta branch to production

CRITICAL FIXES:
1. Add missing initialize_system_detection() call (launcher.sh)
   - System detection was never initialized before building reference database
   - This caused all SYS_* variables to be empty
   - Fixed blank system detection output issue reported on Alma 8

2. Fix all unsafe read statements (launcher.sh - 10+ occurrences)
   - Changed all 'read -r choice' to use /dev/tty with error handling
   - Prevents crashes when stdin is piped (curl | bash)
   - Prevents unexpected SSH session termination
   - Gracefully returns instead of exiting

3. Fix remaining read -p statements (launcher.sh)
   - Added </dev/tty and error suppression to startup and exit prompts
   - Prevents hangs when terminal not available

SECURITY FIXES:
4. Fix SQL injection in database queries (reference-db.sh)
   - Escape database names with backticks: WHERE table_schema=`$db`
   - Prevents malicious database names from breaking SQL

5. Fix password exposure in process listings (reference-db.sh)
   - Use MYSQL_PWD environment variable instead of command line
   - Credentials no longer visible in ps aux output
   - Added cleanup with unset MYSQL_PWD

6. Fix race condition in temp directory creation (common-functions.sh)
   - Changed from mkdir -p to mktemp -d
   - Secure permissions (0700) and unpredictable naming
   - Prevents TOCTOU attacks

All changes validated with bash -n syntax checks
Production launcher now matches/exceeds beta stability

lib/common-functions.sh

@@ -169,8 +169,7 @@ show_terminal_info() {
 # Create temporary session directory
 create_temp_session() {
     export SESSION_ID=$$
-    export TEMP_SESSION_DIR="/tmp/server-toolkit-${SESSION_ID}"
-    mkdir -p "$TEMP_SESSION_DIR"
+    export TEMP_SESSION_DIR=$(mktemp -d -t server-toolkit.XXXXXX)
 
     # Cleanup on exit
     trap '[ -n "$TEMP_SESSION_DIR" ] && rm -rf "$TEMP_SESSION_DIR" 2>/dev/null' EXIT INT TERM