ci: detect relevant changes from git instead of the paginated files API

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

.github/workflows/check-ui-api-types.yml

@@ -10,7 +10,6 @@ on:
 
 permissions:
   contents: read
-  pull-requests: read
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
@@ -26,19 +25,22 @@ jobs:
         uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
         with:
           persist-credentials: false
+          fetch-depth: 2
 
       - name: Detect changes that can affect the generated types
         id: changes
-        env:
-          GH_TOKEN: ${{ github.token }}
-          REPO: ${{ github.repository }}
-          PR_NUMBER: ${{ github.event.pull_request.number }}
         run: |
           set -euo pipefail
-          files="$(gh api --paginate "repos/$REPO/pulls/$PR_NUMBER/files" --jq '.[].filename')"
-          if printf '%s\n' "$files" | grep -Eq '^(litellm/(proxy|types)/|ui/litellm-dashboard/(src/lib/http/schema\.d\.ts|scripts/gen-api-types\.mjs|package(-lock)?\.json)$|\.github/workflows/check-ui-api-types\.yml$)'; then
+          if ! base="$(git rev-parse --verify --quiet HEAD^2 >/dev/null && git rev-parse HEAD^1)"; then
+            echo "Not a pull request merge commit, running the full check."
+            echo "relevant=true" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+          files="$(git diff --name-only "$base" HEAD)"
+          if grep -Eq '^(litellm/(proxy|types)/|ui/litellm-dashboard/(src/lib/http/schema\.d\.ts|scripts/gen-api-types\.mjs|package(-lock)?\.json)$|\.github/workflows/check-ui-api-types\.yml$)' <<< "$files"; then
             echo "relevant=true" >> "$GITHUB_OUTPUT"
           else
+            echo "No proxy, types or generator changes in this pull request, nothing to verify."
             echo "relevant=false" >> "$GITHUB_OUTPUT"
           fi