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/node-agent/cmd/agent/main.go

@@ -433,6 +433,7 @@ func (a *Agent) runJob(ctx context.Context, job *client.ClaimedJob) {
 		HasMusic:       job.HasMusic,
 		HasVoiceover:   job.HasVoiceover,
 		AEPFilePath:    aepPath,
+		CompName:       job.CompName,
 	}
 
 	onProgress := func(ctx context.Context, pct int, msg string) error {