ci(trigger): source TRIGGER_PROJECT_ID from repo secret

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015orsjbLX34FPFGujSK3AQK

Author: TheodoreSpeaks

.github/workflows/ci.yml

@@ -165,7 +165,7 @@ jobs:
         working-directory: ./apps/sim
         env:
           TRIGGER_ACCESS_TOKEN: ${{ secrets.TRIGGER_ACCESS_TOKEN }}
-          TRIGGER_PROJECT_ID: proj_kufttkwzywcydwtccqhx
+          TRIGGER_PROJECT_ID: ${{ secrets.TRIGGER_PROJECT_ID }}
         run: bunx trigger.dev@4.4.3 deploy --env preview --branch dev-sim
 
   # Main/staging: build AMD64 images and push to ECR + GHCR