feat: docker-push ne build que les services modifiés depuis le dernier tag

Détecte les fichiers changés depuis le dernier tag v* :
- apps/api/ ou crates/ changés → rebuild api
- apps/indexer/ ou crates/ changés → rebuild indexer
- apps/backoffice/ changé → rebuild backoffice
- Cargo.toml/Cargo.lock changés → rebuild tout

Affiche les services à build/skip, demande confirmation.
Option de forcer le build de tout si rien n'a changé.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/docker-push.sh

@@ -54,13 +54,66 @@ fi
 
 VERSION="$NEW_VERSION"
 
+# ─── Detect changed services ─────────────────────────────────────────────────
+LAST_TAG=$(git tag -l "v*" --sort=-v:refname | head -1)
+CHANGED_SERVICES=()
+
+if [ -n "$LAST_TAG" ]; then
+    CHANGED_FILES=$(git diff --name-only "$LAST_TAG"..HEAD 2>/dev/null || echo "")
+    CRATES_CHANGED=false
+
+    if echo "$CHANGED_FILES" | grep -q "^crates/"; then
+        CRATES_CHANGED=true
+    fi
+
+    for service in "${SERVICES[@]}"; do
+        if echo "$CHANGED_FILES" | grep -q "^apps/$service/"; then
+            CHANGED_SERVICES+=("$service")
+        elif [ "$CRATES_CHANGED" = true ] && [ "$service" != "backoffice" ]; then
+            # Shared crates affect api and indexer, not backoffice
+            CHANGED_SERVICES+=("$service")
+        fi
+    done
+
+    # Also rebuild if root Cargo.toml/Cargo.lock/Dockerfile changed
+    if echo "$CHANGED_FILES" | grep -qE "^(Cargo\.(toml|lock)|docker-compose)"; then
+        for service in "${SERVICES[@]}"; do
+            if [[ ! " ${CHANGED_SERVICES[*]} " =~ " $service " ]]; then
+                CHANGED_SERVICES+=("$service")
+            fi
+        done
+    fi
+else
+    # No previous tag → build everything
+    CHANGED_SERVICES=("${SERVICES[@]}")
+fi
+
+# If nothing changed, still allow force-building all
+if [ ${#CHANGED_SERVICES[@]} -eq 0 ]; then
+    echo "No services changed since $LAST_TAG."
+    read -rp "Build all anyway? [y/N]: " FORCE_ALL
+    if [[ "$FORCE_ALL" =~ ^[Yy]$ ]]; then
+        CHANGED_SERVICES=("${SERVICES[@]}")
+    else
+        echo "Nothing to push."
+        exit 0
+    fi
+fi
+
 echo ""
 echo "Registry: $REGISTRY"
 echo "Version: $VERSION"
-echo "Services: ${SERVICES[*]}"
+echo "Last tag: ${LAST_TAG:-none}"
+echo "Services to build: ${CHANGED_SERVICES[*]}"
+echo "Skipped: $(for s in "${SERVICES[@]}"; do [[ ! " ${CHANGED_SERVICES[*]} " =~ " $s " ]] && echo -n "$s "; done)"
 echo ""
+read -rp "Continue? [Y/n]: " CONFIRM
+if [[ "$CONFIRM" =~ ^[Nn]$ ]]; then
+    echo "Aborted."
+    exit 0
+fi
 
-for service in "${SERVICES[@]}"; do
+for service in "${CHANGED_SERVICES[@]}"; do
     echo "Building $service..."
     docker build -f "apps/$service/Dockerfile" -t "$service:latest" .
 
@@ -78,12 +131,18 @@ for service in "${SERVICES[@]}"; do
     echo ""
 done
 
-echo "=== All images pushed to $REGISTRY ==="
-echo "Images:"
-for service in "${SERVICES[@]}"; do
-    echo "  - $REGISTRY/$OWNER/stripstream-$service:$VERSION"
-    echo "  - $REGISTRY/$OWNER/stripstream-$service:latest"
+echo "=== Push complete ==="
+echo "Built & pushed:"
+for service in "${CHANGED_SERVICES[@]}"; do
+    echo "  ✓ $REGISTRY/$OWNER/stripstream-$service:$VERSION"
 done
+SKIPPED=""
+for s in "${SERVICES[@]}"; do
+    [[ ! " ${CHANGED_SERVICES[*]} " =~ " $s " ]] && SKIPPED="$SKIPPED $s"
+done
+if [ -n "$SKIPPED" ]; then
+    echo "Skipped (unchanged):$SKIPPED"
+fi
 
 # Tag git with version
 if ! git tag -l "v$VERSION" | grep -q "v$VERSION"; then