fix(render): real AE render — pass -comp, fix export insert, ensure exports bucket

Three bugs surfaced bringing up a real After Effects node (verified: AE 2026
claimed + ran, but produced no usable output):

1. aerender got no -comp/-rqindex → "output argument ignored", nothing rendered.
   - Claim now returns comp_name from content.projects.render_aep_comp (e.g. "frfinal")
     via new Store.GetTemplateCompName; threaded through ClaimedJob → runner.Job →
     aerender args (`-comp <name>`, or `-rqindex 1` fallback when unknown).

2. CreateExportForJob INSERT passed render_quality as a bare param into an enum
   column → 500 ("output-upload-url HTTP 500"), so completed renders had no export.
   - Cast $8::render.render_quality (+ explicit casts for file_type/create_type enums).

3. flatrender-exports bucket didn't exist → uploads would fail anyway.
   - render-svc now MakeBucket(exports, templates) idempotently at startup.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

services/render/cmd/server/main.go

@@ -60,6 +60,16 @@ func main() {
 	if err != nil {
 		log.Fatalf("minio client: %v", err)
 	}
+	// Ensure the render output bucket exists (node agents PUT exports here).
+	for _, b := range []string{minioBucket, minioTemplatesBucket} {
+		if exists, berr := mc.BucketExists(context.Background(), b); berr == nil && !exists {
+			if merr := mc.MakeBucket(context.Background(), b, minio.MakeBucketOptions{}); merr != nil {
+				log.Printf("warning: could not create bucket %q: %v", b, merr)
+			} else {
+				log.Printf("created bucket %q", b)
+			}
+		}
+	}
 
 	// ── Store + handlers ──────────────────────────────────────────────────────
 	store    := db.NewStore(pool)

services/render/internal/db/db.go

@@ -626,6 +626,22 @@ func (s *Store) ClaimJob(ctx context.Context, nodeID uuid.UUID, region string) (
 // The export starts with a placeholder path `exports/{export_id}/output.mp4`.
 // The node agent uploads the MP4 to that MinIO path, then calls CompleteJob
 // with the returned export_id.
+// GetTemplateCompName returns the After Effects composition to render for a
+// template (content.projects.render_aep_comp), e.g. "frfinal". aerender needs
+// this via -comp; without it AE opens the project but renders nothing.
+func (s *Store) GetTemplateCompName(ctx context.Context, originalProjectID uuid.UUID) (string, error) {
+	var comp *string
+	err := s.pool.QueryRow(ctx,
+		`SELECT render_aep_comp FROM content.projects WHERE id = $1`, originalProjectID).Scan(&comp)
+	if err != nil {
+		return "", err
+	}
+	if comp == nil {
+		return "", nil
+	}
+	return *comp, nil
+}
+
 func (s *Store) CreateExportForJob(ctx context.Context, jobID uuid.UUID) (*models.Export, error) {
 	// Look up the job to get tenant/user/project context
 	job, err := s.getJobByIDInternal(ctx, jobID)
@@ -646,8 +662,8 @@ func (s *Store) CreateExportForJob(ctx context.Context, jobID uuid.UUID) (*model
 			 delete_notified, created_at)
 		VALUES
 			($1, $2, $3, $4, $5,
-			 $6, $7, 'mp4', 'video', $8,
-			 'render', 0, $9, $10,
+			 $6, $7, 'mp4', 'video'::render.export_file_type, $8::render.render_quality,
+			 'render'::render.export_create_type, 0, $9, $10,
 			 false, $9)`,
 		exportID, job.TenantID, job.UserID, job.SavedProjectID, job.OriginalProjectID,
 		job.ID, path, job.Quality,

services/render/internal/handlers/internal.go

@@ -289,6 +289,9 @@ func (h *InternalHandler) Claim(c *gin.Context) {
 		}
 	}
 
+	// Composition to render (-comp). Non-fatal: empty → node uses the render queue.
+	compName, _ := h.store.GetTemplateCompName(c.Request.Context(), job.OriginalProjectID)
+
 	c.JSON(http.StatusOK, models.ClaimedJob{
 		JobID:          job.ID,
 		SavedProjectID: job.SavedProjectID,
@@ -300,6 +303,7 @@ func (h *InternalHandler) Claim(c *gin.Context) {
 		AEPDownloadURL: aepURL,
 		IsBundle:       isBundle,
 		BundleMD5:      bundleMD5,
+		CompName:       compName,
 	})
 }
 

services/render/internal/models/models.go

@@ -428,6 +428,10 @@ type ClaimedJob struct {
 	// BundleMD5 is the stored object's ETag/MD5 — the node uses it as a cache key so
 	// repeated renders of the same template download + extract the bundle only once.
 	BundleMD5 string `json:"bundle_md5,omitempty"`
+	// CompName is the After Effects composition to render (-comp). From the
+	// template's render_aep_comp (e.g. "frfinal"). Empty → node falls back to the
+	// project's render queue.
+	CompName string `json:"comp_name,omitempty"`
 }
 
 // OutputUploadURLResponse is returned by POST .../output-upload-url.