fix(ci): 修复auto-merge缺少GITEA_API_TOKEN环境变量

1. 给auto-merge.yml的两个merge step添加GITEA_API_TOKEN环境变量，复用REVIEW_GITEA_TOKEN secret
2. 修复tests.yml的checkout步骤GITHUB_TOKEN和Python命令
3. 给main分支ci-cd.yml的单元测试增加Redis服务，修复Celery相关测试失败

.gitea/workflows/auto-merge.yml

@@ -13,9 +13,13 @@ jobs:
         uses: actions/checkout@v3
       
       - name: Auto merge develop PRs
+        env:
+          GITEA_API_TOKEN: ${{ secrets.REVIEW_GITEA_TOKEN }}
         run: |
           bash scripts/auto_merge_prs.sh develop
       
       - name: Auto merge main PRs (release only)
+        env:
+          GITEA_API_TOKEN: ${{ secrets.REVIEW_GITEA_TOKEN }}
         run: |
           bash scripts/auto_merge_prs.sh main

.gitea/workflows/ci-cd.yml

@@ -128,6 +128,27 @@ jobs:
           grep -q "Running upgrade" /tmp/alembic-upgrade.sql
           python3 scripts/check_schema_metadata.py
 
+      - name: Start Redis for unit tests
+        shell: sh
+        run: |
+          set -eu
+          docker rm -f ci-redis-validate 2>/dev/null || true
+          docker run -d --name ci-redis-validate \
+            -p 6379:6379 \
+            --health-cmd "redis-cli ping" \
+            --health-interval 2s \
+            --health-timeout 2s \
+            --health-retries 15 \
+            redis:7-alpine
+          for i in $(seq 1 20); do
+            if docker inspect --format='{{.State.Health.Status}}' ci-redis-validate 2>/dev/null | grep -q healthy; then
+              echo "Redis is ready"
+              break
+            fi
+            echo "Waiting for Redis... ($i/20)"
+            sleep 1
+          done
+          docker inspect --format='{{.State.Health.Status}}' ci-redis-validate | grep -q healthy
       - name: Run unit tests
         shell: sh
         env:

.gitea/workflows/tests.yml

@@ -11,9 +11,11 @@ jobs:
     steps:
     - name: Checkout code
       shell: sh
+      env:
+        GITHUB_TOKEN: ${{ github.token }}
       run: |
         set -eu
-        python - <<'PY'
+        python3 - <<'PY'
         import io
         import os
         import tarfile
@@ -93,9 +95,11 @@ jobs:
     steps:
     - name: Checkout code
       shell: sh
+      env:
+        GITHUB_TOKEN: ${{ github.token }}
       run: |
         set -eu
-        python - <<'PY'
+        python3 - <<'PY'
         import io
         import os
         import tarfile