feat: establish Orbit models, migrations and development baseline

internal/transport/httpserver/server.go

@@ -0,0 +1,34 @@
+// Package httpserver exposes bootstrap health endpoints only. Task, workflow,
+// authentication and WebSocket APIs will be implemented in subsequent slices.
+package httpserver
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"time"
+)
+
+type Checker func(context.Context) error
+
+func New(addr string, ready Checker) *http.Server {
+	mux := http.NewServeMux()
+	write := func(w http.ResponseWriter, status int, body map[string]string) {
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(status)
+		_ = json.NewEncoder(w).Encode(body)
+	}
+	mux.HandleFunc("GET /health/live", func(w http.ResponseWriter, r *http.Request) {
+		write(w, http.StatusOK, map[string]string{"status": "alive"})
+	})
+	mux.HandleFunc("GET /health/ready", func(w http.ResponseWriter, r *http.Request) {
+		ctx, cancel := context.WithTimeout(r.Context(), 2*time.Second)
+		defer cancel()
+		if ready == nil || ready(ctx) != nil {
+			write(w, http.StatusServiceUnavailable, map[string]string{"status": "not_ready"})
+			return
+		}
+		write(w, http.StatusOK, map[string]string{"status": "ready", "scope": "database_and_schema"})
+	})
+	return &http.Server{Addr: addr, Handler: mux, ReadHeaderTimeout: 5 * time.Second, ReadTimeout: 10 * time.Second, WriteTimeout: 10 * time.Second, IdleTimeout: 60 * time.Second, MaxHeaderBytes: 16 << 10}
+}