feat: COMPOSE_PROJECT_NAME depuis vars CI Woodpecker

- COMPOSE_PROJECT_NAME construit dynamiquement : CI_REPO_OWNER-CI_COMMIT_BRANCH-prestashop
  -> plus de valeur en dur dans le fichier
- validate : PS_DOMAIN/PS_ADMIN_FOLDER/COMPOSE_PROJECT_NAME calcules dans commands
  via les vars CI injectees automatiquement par Woodpecker
- PS_DOMAIN placeholder remplace presta.syoul.fr hardcode dans validate

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -1,7 +1,11 @@
+# Convention de nommage : user-env-project (ex: syoul-main-prestashop)
+# Permet plusieurs instances en parallele (prod/test/multi-user) sans collision
+name: ${COMPOSE_PROJECT_NAME:-syoul-main-prestashop}
+
 services:
   prestashop:
     image: prestashop/prestashop:8-apache
-    container_name: prestashop
+    container_name: ${COMPOSE_PROJECT_NAME:-syoul-main-prestashop}-app
     restart: unless-stopped
     depends_on:
       db:
@@ -41,7 +45,7 @@ services:
 
   db:
     image: mariadb:10.11
-    container_name: prestashop-db
+    container_name: ${COMPOSE_PROJECT_NAME:-syoul-main-prestashop}-db
     restart: unless-stopped
     environment:
       MYSQL_ROOT_PASSWORD: ${DB_ROOT_PASSWORD}