N8N webhook trigger in publish pipeline

[mayansharma]

Adds a post-publish hook to the Publish GitHub Actions workflow so successful catalyst-core publishes can trigger the Catalyst release automation in n8n.

Changes

• Adds pull-requests: read permission so the workflow can resolve the merged PR associated with the publish commit.
• After a successful catalyst-core publish, calls GitHub’s commit PR API to resolve:
  • PR number
  • PR URL
• Sends a structured payload to secrets.N8N_MASTER_WEBHOOK_URL with:
  • pr_id
  • pr_link
  • version
  • channel
  • repository/branch/run metadata
  • enabled release channels

[deputydev-agent]

DeputyDev will no longer review pull requests automatically.To request a review, simply comment #review on your pull request—this will trigger an on-demand review whenever you need it.