ci: add deploy script and simplify CI/CD workflow

- scripts/deploy.sh: automated deployment with interactive env setup
  (--env-only, --build, --full)
- Supports OpenRouter, OpenAI, Ollama, DeepSeek providers
- Auto-generates NEXTAUTH_SECRET and postgres password
- Waits for healthchecks, initializes DB, shows status
- CI/CD workflow simplified to call deploy.sh --build

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitea/workflows/deploy.yaml

@@ -17,27 +17,8 @@ jobs:
           username: ${{ secrets.DEPLOY_USER }}
           key: ${{ secrets.DEPLOY_SSH_KEY }}
           port: ${{ secrets.DEPLOY_PORT || 22 }}
+          script_stop: true
+          command_timeout: 10m
           script: |
-            set -e
-
-            echo "=== Memento Deploy ==="
-            echo "Branch: ${{ gitea.ref }}"
-
-            # Go to project directory
-            cd ${{ secrets.DEPLOY_PATH }}/Momento
-
-            # Pull latest code
-            git pull origin main
-
-            # Build and restart containers
-            docker compose build --parallel
-            docker compose up -d
-
-            # Wait for healthchecks
-            echo "Waiting for containers to be healthy..."
-            sleep 10
-
-            # Check status
-            docker compose ps
-
-            echo "=== Deploy complete ==="
+            cd ${{ secrets.DEPLOY_PATH }}
+            bash scripts/deploy.sh --build