ci(pi-assistant): configure git identity and inject task from triggering comment

Author: mcowger

.github/workflows/pi-assistant.yml

@@ -50,6 +50,11 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: Configure Git identity
+        run: |
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git config user.name "github-actions[bot]"
+
       - uses: oven-sh/setup-bun@v2
         with:
           bun-version: latest