feat: add app_id to ApplyDeployment proto and krane pod labels

- Proto: add app_id field (18) to ApplyDeployment message
- Ctrl: pass deployment.AppID through deploymentRowToState
- Krane: add .AppID() label to deployment pods so Vector extracts it

Author: Flo4604

gen/proto/ctrl/v1/cluster.pb.go

@@ -308,6 +308,10 @@ message ApplyDeployment {
   // healthcheck is a JSON-encoded Healthcheck struct for configuring liveness/readiness probes.
   // If empty, no probes are configured.
   optional bytes healthcheck = 17;
+
+  // app_id identifies the app within the project.
+  // Used for pod labels so Vector can extract it into runtime logs.
+  string app_id = 18;
 }
 
 // DeleteDeployment identifies a deployment to remove from the cluster.

svc/ctrl/proto/ctrl/v1/cluster.proto

@@ -126,6 +126,7 @@ func (s *Service) deploymentRowToState(row db.ListDeploymentTopologyByRegionRow)
 			WorkspaceId:                   row.Deployment.WorkspaceID,
 			ProjectId:                     row.Deployment.ProjectID,
 			EnvironmentId:                 row.Deployment.EnvironmentID,
+			AppId:                         row.Deployment.AppID,
 			Replicas:                      row.DeploymentTopology.DesiredReplicas,
 			Image:                         row.Deployment.Image.String,
 			CpuMillicores:                 int64(row.Deployment.CpuMillicores),

svc/ctrl/services/cluster/rpc_watch_deployments.go

@@ -66,6 +66,7 @@ func (c *Controller) ApplyDeployment(ctx context.Context, req *ctrlv1.ApplyDeplo
 	usedLabels := labels.New().
 		WorkspaceID(req.GetWorkspaceId()).
 		ProjectID(req.GetProjectId()).
+		AppID(req.GetAppId()).
 		EnvironmentID(req.GetEnvironmentId()).
 		DeploymentID(req.GetDeploymentId()).
 		BuildID(req.GetBuildId()).