fix: handle passwords with special characters in health check

The health check was failing when MySQL passwords contained special
characters like # because it was sourcing .env as a bash script,
where # is treated as a comment.

Solution: Remove unnecessary .env sourcing and use environment variables
directly from the db container, which Docker Compose has already correctly
parsed from .env.

This fixes the "Impossible de se connecter à MySQL" error when passwords
contain #, $, !, or other special characters.

Benefits:
- Works with any special characters in passwords
- Simpler code (removed 4 lines)
- More reliable (uses container's environment directly)

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

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

scripts/check-health.sh

@@ -131,19 +131,12 @@ echo "▶ Base de données:"
 if docker-compose exec -T db mysqladmin ping -h localhost --silent 2>/dev/null; then
   check_ok "MariaDB répond"
 
-  # Charger .env pour tester la connexion
-  if [ -f .env ]; then
-    set -a
-    # shellcheck disable=SC1091
-    source .env
-    set +a
-
-    if docker-compose exec -T db sh -c "MYSQL_PWD=\"\$MYSQL_PASSWORD\" mysql -u\"\$MYSQL_USER\" \"\$MYSQL_DATABASE\" -e 'SELECT 1' >/dev/null 2>&1"; then
+  # Tester la connexion MySQL (utilise les variables d'environnement du container)
+  if docker-compose exec -T db sh -c 'MYSQL_PWD="$MYSQL_PASSWORD" mysql -u"$MYSQL_USER" "$MYSQL_DATABASE" -e "SELECT 1"' >/dev/null 2>&1; then
     check_ok "Connexion MySQL fonctionnelle"
   else
     check_fail "Impossible de se connecter à MySQL"
   fi
-  fi
 else
   check_fail "MariaDB ne répond pas"
 fi