CI : suppression .woodpecker/seed.yml — restaure les triggers push

Le fichier séparé cassait Woodpecker 3.x (multi-file + when:manual
empêchait tous les triggers push depuis commit 1842303c).

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

.woodpecker/seed.yml

@@ -1,15 +0,0 @@
-when:
-  - branch: main
-    event: manual
-
-steps:
-  - name: seed
-    image: docker:27-cli
-    volumes:
-      - /var/run/docker.sock:/var/run/docker.sock
-      - /opt/libredecision:/opt/libredecision
-    commands:
-      - |
-        PROJECT=$(grep '^COMPOSE_PROJECT_NAME=' /opt/libredecision/.env | cut -d= -f2)
-        echo "Seeding $PROJECT-backend..."
-        docker exec "$PROJECT-backend" python seed.py