chore: import upstream snapshot with attribution

.github/workflows/discussion_answering.yml

@@ -0,0 +1,71 @@
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: ADK Answering Agent for Discussions
+
+on:
+  discussion:
+    types: [created]
+  discussion_comment:
+    types: [created]
+
+permissions:
+  contents: read
+
+jobs:
+  agent-answer-questions:
+    if: >-
+      github.repository == 'google/adk-python' && (
+      (github.event_name == 'discussion' && github.event.discussion.category.name == 'Q&A') ||
+      (github.event_name == 'discussion_comment' && contains(github.event.comment.body, '@adk-bot') && github.event.sender.login != 'adk-bot')
+      )
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.11'
+
+      - name: Authenticate to Google Cloud
+        id: auth
+        uses: 'google-github-actions/auth@v3'
+        with:
+          credentials_json: '${{ secrets.ADK_GCP_SA_KEY }}'
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install google-adk google-cloud-discoveryengine
+
+      - name: Run Answering Script
+        env:
+          GITHUB_TOKEN: ${{ secrets.ADK_TRIAGE_AGENT }}
+          ADK_GCP_SA_KEY: ${{ secrets.ADK_GCP_SA_KEY }}
+          GOOGLE_CLOUD_PROJECT: ${{ secrets.GOOGLE_CLOUD_PROJECT }}
+          GOOGLE_CLOUD_LOCATION: ${{ secrets.GOOGLE_CLOUD_LOCATION }}
+          VERTEXAI_DATASTORE_ID: ${{ secrets.VERTEXAI_DATASTORE_ID }}
+          GEMINI_API_DATASTORE_ID: ${{ secrets.GEMINI_API_DATASTORE_ID }}
+          GOOGLE_GENAI_USE_VERTEXAI: 1
+          OWNER: 'google'
+          REPO: 'adk-python'
+          INTERACTIVE: 0
+          PYTHONPATH: contributing/samples/adk_team
+          DISCUSSION_JSON: ${{ toJson(github.event.discussion) }}
+        run: |
+          python -c "import os; open('/tmp/discussion.json', 'w').write(os.environ['DISCUSSION_JSON'])"
+          python -m adk_answering_agent.main --discussion-file /tmp/discussion.json