fix(ci): replace checkout action with git clone (no node on host runner)

actions/checkout@v3 is a JavaScript action requiring node in PATH.
Host runners have no node. Replace with direct git clone/fetch.

Co-Authored-By: Mira <noreply@anthropic.com>

.gitea/workflows/deploy.yml

@@ -7,11 +7,16 @@ on:
 jobs:
   deploy:
     runs-on: [self-hosted, host]
-    timeout-minutes: 15
+    timeout-minutes: 20
     steps:
-      - uses: actions/checkout@v3
+      - name: Checkout
-        with:
+        run: |
-          fetch-depth: 1
+          if [ -d .git ]; then
+            git fetch --depth=1 origin main
+            git reset --hard FETCH_HEAD
+          else
+            git clone --depth=1 http://localhost:3001/apix/apix-mvp.git .
+          fi
 
       - name: Deploy (rolling zero-downtime)
         run: bash scripts/deploy-bluegreen.sh