pr: handle case of nil user in reviews

This can happen when a review request is assigned automatically via
CODEOWNERS or perhaps the requesting user has account removed.

common/reviews.go

@@ -51,7 +51,7 @@ func FetchGiteaReviews(rf GiteaReviewTimelineFetcher, org, repo string, no int64
 	for idx, item := range timeline {
 		if item.Type == TimelineCommentType_Review || item.Type == TimelineCommentType_ReviewRequested {
 			for _, r := range rawReviews {
-				if r.ID == item.ReviewID {
+				if r.ID == item.ReviewID && r.User != nil {
 					if !alreadyHaveUserReview(r.User.UserName) {
 						if item.Type == TimelineCommentType_Review && idx > cutOffIdx {
 							needNewReviews = append(needNewReviews, r.User.UserName)

common/reviews_test.go

@@ -137,6 +137,14 @@ func TestReviews(t *testing.T) {
 			isApproved:        false,
 			isReviewedByTest1: true,
 		},
+		{
+			name: "Ghost user review",
+			reviews: []*models.PullReview{
+				{State: common.ReviewStateApproved, User: nil},
+			},
+			reviewers:  []string{"user1"},
+			isApproved: false,
+		},
 	}
 
 	for _, test := range tests {

integration/podman-compose.yml

@@ -8,6 +8,7 @@ services:
   gitea:
     build: ./gitea
     container_name: gitea-test
+    init: true
     environment:
       - GITEA_WORK_DIR=/var/lib/gitea
     networks:
@@ -27,6 +28,7 @@ services:
   rabbitmq:
     image: rabbitmq:3.13.7-management
     container_name: rabbitmq-test
+    init: true
     healthcheck:
       test: ["CMD", "rabbitmq-diagnostics", "check_running", "-q"]
       interval: 30s
@@ -55,6 +57,7 @@ services:
       context: ..
       dockerfile: integration/gitea-events-rabbitmq-publisher/Dockerfile${GIWTF_IMAGE_SUFFIX}
     container_name: gitea-publisher
+    init: true
     networks:
       - gitea-network
     depends_on:
@@ -75,6 +78,7 @@ services:
       context: ..
       dockerfile: integration/workflow-pr/Dockerfile${GIWTF_IMAGE_SUFFIX}
     container_name: workflow-pr
+    init: true
     networks:
       - gitea-network
     depends_on:
@@ -103,6 +107,7 @@ services:
   mock-obs:
     build: ./mock-obs
     container_name: mock-obs
+    init: true
     networks:
       - gitea-network
     ports:
@@ -116,6 +121,7 @@ services:
       context: ..
       dockerfile: integration/obs-staging-bot/Dockerfile${GIWTF_IMAGE_SUFFIX}
     container_name: obs-staging-bot
+    init: true
     networks:
       - gitea-network
     depends_on: