chore: allow run integration test workflow for org members

.github/workflows/integration-tests.yml

@@ -1,19 +1,65 @@
 name: Integration Tests
 
 on:
-  workflow_dispatch:
   push:
-    branches: [main]
+    branches:
+      - main
+
+  workflow_dispatch:
+
+  issue_comment:
+    types:
+      - created
 
 jobs:
   integration:
     name: Live LLM Integration Tests
+
+    if: |
+      github.event_name == 'push' ||
+      github.event_name == 'workflow_dispatch' ||
+      (
+        github.event_name == 'issue_comment' &&
+        github.event.issue.pull_request &&
+        startsWith(github.event.comment.body, '/integration-test') &&
+        (
+          github.event.comment.author_association == 'MEMBER' ||
+          github.event.comment.author_association == 'OWNER'
+        )
+      )
+
     runs-on: ubuntu-latest
+
     defaults:
       run:
         working-directory: ./backend
+
     steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+      - name: Get PR details
+        if: github.event_name == 'issue_comment'
+        id: pr
+        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        with:
+          script: |
+            const pr = await github.rest.pulls.get({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              pull_number: context.issue.number
+            });
+
+            core.setOutput('head_ref', pr.data.head.ref);
+            core.setOutput('head_repo', pr.data.head.repo.full_name);
+
+      - name: Checkout PR branch
+        if: github.event_name == 'issue_comment'
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  #v4.3.1
+        with:
+          repository: ${{ steps.pr.outputs.head_repo }}
+          ref: ${{ steps.pr.outputs.head_ref }}
+
+      - name: Checkout repository
+        if: github.event_name != 'issue_comment'
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  #v4.3.1
 
       - name: Set up Python
         uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0