The CI/CD workflow was running twice on every PR - once for pull_request and once for push events, since GitHub triggers both when a PR is opened or updated.

Changes

• Added branch filter to push trigger in .github/workflows/ci-cd.yml to restrict it to main branch only

on:
  pull_request:
  push:
    branches:
      - main
  workflow_dispatch:
  workflow_run:
    workflows: ["Pre-commit fix"]
    types:
      - completed

This ensures:

• PRs trigger the workflow once via pull_request event
• Direct pushes to main trigger via push event
• Manual and workflow dependency triggers remain unchanged

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