fix(mam-api): pass project_id into conform job so render can register the asset

The conform worker's final step INSERTs the rendered output into the
assets table:

  INSERT INTO assets (project_id, filename, display_name, …)
  VALUES ($1, …)
  -- project_id NOT NULL

It reads projectId from job.data, but the /sequences/:id/conform
endpoint never set it. Render finished cleanly, ffmpeg ran, output
uploaded to S3, then the final asset row INSERT failed:
  null value in column "project_id" of relation "assets"

Pass seq.project_id from the loaded sequence row. The rendered output
lands as an asset under the same project as its source sequence —
the natural target.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

services/mam-api/src/routes/sequences.js

@@ -315,6 +315,12 @@ router.post('/:id/conform', async (req, res, next) => {
     const bullJob = await conformQueue.add('conform-task', {
       fcpXml: fcp_xml,
       sequenceId: req.params.id,
+      // The worker INSERTs the rendered output into the `assets` table at the
+      // end of the pipeline; project_id is NOT NULL on that table, so without
+      // this the conform finished successfully but failed at the very last
+      // step. Sequences live under projects, so the natural target for the
+      // rendered output is the sequence's own project.
+      projectId: seq.project_id,
       sequenceName: seq.name,
       frameRate: seq.frame_rate,
       width: seq.width,