chore(ci): consolidate scheduled workflow into main pipeline

Merged the schedule trigger from scheduled-1.4.yml into MainDistributionPipeline.yml
to eliminate duplication and maintain a single source of truth for workflow triggers.

Changes:
- Added schedule trigger (cron: '0 12 * * *') to MainDistributionPipeline.yml
- Deleted redundant scheduled-1.4.yml workflow file

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: bjoernbethge

.github/workflows/MainDistributionPipeline.yml

@@ -3,6 +3,8 @@ on:
   push:
   pull_request:
   workflow_dispatch:
+  schedule:
+    - cron: '0 12 * * *'  # Runs at 12:00 UTC every day
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}-${{ github.head_ref || '' }}-${{
     github.base_ref || '' }}-${{ github.ref != 'refs/heads/main' && github.sha ||