ci: pipeline seed séparé (.woodpecker/seed.yml, event: manual)

Pipeline dédié au seeding DB, déclenché uniquement manuellement.
Retire le step seed du pipeline principal.

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

.woodpecker.yml

@@ -217,21 +217,6 @@ steps:
         echo "FAIL: app ne repond pas apres 10 minutes"
         exit 1
 
-  # Seed manuel : déclencher via CI API ou interface Woodpecker (event: manual)
-  - name: seed
-    image: docker:27-cli
-    depends_on:
-      - deploy
-    volumes:
-      - /var/run/docker.sock:/var/run/docker.sock
-      - /opt/libredecision:/opt/libredecision
-    commands:
-      - |
-        PROJECT=$(grep '^COMPOSE_PROJECT_NAME=' /opt/libredecision/.env | cut -d= -f2)
-        docker exec "$PROJECT-backend" python seed.py
-    when:
-      - event: manual
-
   - name: notify-failure
     image: alpine:3.20
     commands:

.woodpecker/seed.yml

@@ -0,0 +1,15 @@
+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