feat: establish Orbit models, migrations and development baseline

sdk/go/examples/health/main.go

@@ -0,0 +1,33 @@
+// Run against a started bootstrap server: ORBIT_URL=http://127.0.0.1:8080 go run ./examples/health
+package main
+
+import (
+	"context"
+	"fmt"
+	orbit "git.yuntuo.hk/k2safe/orbit/sdk/go"
+	"log"
+	"os"
+	"time"
+)
+
+func main() {
+	address := os.Getenv("ORBIT_URL")
+	if address == "" {
+		address = "http://127.0.0.1:8080"
+	}
+	client, err := orbit.NewClient(address, orbit.Options{})
+	if err != nil {
+		log.Fatal(err)
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+	live, err := client.Liveness(ctx)
+	if err != nil {
+		log.Fatal(err)
+	}
+	ready, err := client.Readiness(ctx)
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Printf("liveness=%s readiness=%s scope=%s\n", live.Status, ready.Status, ready.Scope)
+}