Add initial Go server skeleton with HTTP handlers, middleware, job runner, and stubs

internal/http/app.go

@@ -0,0 +1,17 @@
+package http
+
+import (
+	"database/sql"
+	"net/http"
+
+	"github.com/example/storage-appliance/internal/service"
+)
+
+// App contains injected dependencies for handlers.
+type App struct {
+	DB         *sql.DB
+	DiskSvc    service.DiskService
+	ZFSSvc     service.ZFSService
+	JobRunner  service.JobRunner
+	HTTPClient *http.Client
+}