Fix CI workflow - auto-detect architecture

The Gitea runner uses ARM64, not x86_64. Detect architecture
at runtime and download the appropriate NATS server binary.

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

.gitea/workflows/ci.yaml

@@ -27,13 +27,27 @@ jobs:
           go-version: '1.23'
       - name: Install and Start NATS Server
         run: |
-          # Download nats-server
-          curl -L https://github.com/nats-io/nats-server/releases/download/v2.10.24/nats-server-v2.10.24-linux-amd64.tar.gz -o nats-server.tar.gz
+          # Detect architecture and download appropriate binary
+          ARCH=$(uname -m)
+          if [ "$ARCH" = "x86_64" ]; then
+            NATS_ARCH="amd64"
+          elif [ "$ARCH" = "aarch64" ] || [ "$ARCH" = "arm64" ]; then
+            NATS_ARCH="arm64"
+          else
+            echo "Unsupported architecture: $ARCH"
+            exit 1
+          fi
+          echo "Detected architecture: $ARCH, using NATS binary: $NATS_ARCH"
+
+          # Download and extract nats-server
+          curl -L "https://github.com/nats-io/nats-server/releases/download/v2.10.24/nats-server-v2.10.24-linux-${NATS_ARCH}.tar.gz" -o nats-server.tar.gz
           tar -xzf nats-server.tar.gz
-          # Run directly from extracted location (no sudo needed)
-          ./nats-server-v2.10.24-linux-amd64/nats-server -js -p 4222 &
+
+          # Start NATS with JetStream
+          ./nats-server-v2.10.24-linux-${NATS_ARCH}/nats-server -js -p 4222 &
+
           # Wait for NATS to be ready
           sleep 3
-          ./nats-server-v2.10.24-linux-amd64/nats-server --version
+          ./nats-server-v2.10.24-linux-${NATS_ARCH}/nats-server --version
       - name: Run Integration Tests
         run: go test -tags=integration -v ./...