Use the new handlers when evaluating repo webhooks

We added new watermill handlers that allow to refresh and evaluate a
generic entity with properties. This is the first patch in a series that
takes these handlers into account with the eventual goal of removing all
the bespoke code from the GitHub webhook handler and eventually remove
direct database access from the webhook handler.

I'll expand the same method for the other webhook events we issue, but
let's do small PRs so we can have some test runs in between them and
revert in case of issues.

Related: mindersec#4327

internal/controlplane/handlers_githubwebhooks.go

@@ -40,6 +40,7 @@ import (
 	"github.com/stacklok/minder/internal/controlplane/metrics"
 	"github.com/stacklok/minder/internal/db"
 	"github.com/stacklok/minder/internal/engine/entities"
+	entityMessage "github.com/stacklok/minder/internal/entities/handlers/message"
 	"github.com/stacklok/minder/internal/entities/models"
 	"github.com/stacklok/minder/internal/entities/properties"
 	"github.com/stacklok/minder/internal/entities/properties/service"
@@ -944,29 +945,7 @@ func (s *Server) processRepositoryEvent(
 
 	l.Info().Msg("handling event for repository")
 
-	repoEnt, err := s.fetchRepo(ctx, event.GetRepo())
-	if err != nil {
-		return nil, err
-	}
-
-	// protobufs are our API, so we always execute on these instead of the DB directly.
-	pbMsg, err := s.props.EntityWithPropertiesAsProto(ctx, repoEnt, s.providerManager)
-	if err != nil {
-		return nil, fmt.Errorf("error converting repository to protobuf: %w", err)
-	}
-
-	pbRepo, ok := pbMsg.(*pb.Repository)
-	if !ok {
-		return nil, errors.New("error converting proto message to protobuf")
-	}
-
-	eiw := entities.NewEntityInfoWrapper().
-		WithProjectID(repoEnt.Entity.ProjectID).
-		WithProviderID(repoEnt.Entity.ProviderID).
-		WithRepository(pbRepo).
-		WithRepositoryID(repoEnt.Entity.ID)
-
-	return &processingResult{topic: events.TopicQueueEntityEvaluate, wrapper: eiw}, nil
+	return s.sendEvaluateRepoMessage(event.GetRepo(), events.TopicQueueRefreshEntityAndEvaluate)
 }
 
 // nolint:gocyclo // This function will be re-simplified real soon
@@ -1252,6 +1231,28 @@ func (_ *Server) repositoryAdded(
 	}, nil
 }
 
+func (_ *Server) sendEvaluateRepoMessage(
+	repo *repo,
+	handler string,
+) (*processingResult, error) {
+	lookByProps, err := properties.NewProperties(map[string]any{
+		// the PropertyUpstreamID is always a string
+		properties.PropertyUpstreamID: strconv.FormatInt(repo.GetID(), 10),
+	})
+	if err != nil {
+		return nil, fmt.Errorf("error creating repository properties: %w", err)
+	}
+
+	entRefresh := entityMessage.NewEntityRefreshAndDoMessage().
+		WithEntity(pb.Entity_ENTITY_REPOSITORIES, lookByProps).
+		WithProviderImplementsHint(string(db.ProviderTypeGithub))
+
+	return &processingResult{
+			topic:   handler,
+			wrapper: entRefresh},
+		nil
+}
+
 func (s *Server) fetchRepo(
 	ctx context.Context,
 	repo *repo,