v2.0.0: error-channel APIs, correctness fixes, and server hardening

BREAKING CHANGES:
- Guard interface: Guard(ctx Ctx) error; returning error short-circuits
  (subsequent guards and the method no longer execute)
- Wired[T]() (*T, error); New() may return error; failed wiring is sticky
- BindService/BindGuard/BindRoute return error; routes accept guards
  (guards receive merged query/form params as Ctx.State)
- registration panics after Start; Ctx.Ip honors X-Forwarded-For/X-Real-IP
- internal errors sanitized to fixed client messages

FIXES:
- int64 precision loss: /cell data decoded from raw JSON bytes and
  responses serialized with json.Number (no float64 round-trip)
- enum values range-checked before uint8 conversion (256 no longer
  truncates to 0 and slips through)
- logger: files failing name parsing are no longer deleted; log channel
  never blocks request goroutines; ConfigLogger is race-free;
  logWriterWorker unlock bug fixed
- stream writer panics recovered (process no longer crashes);
  streamDone closed exactly once
- generated Go client emits definitions for pointer-to-enum/struct fields
- anonymous structs rejected at registration; isPrivate safe on empty names
- removed dead Result.Id and RequestInfo.Type

ADDITIONS:
- graceful shutdown (Shutdown), StartOn, server timeouts by default
  (Read 60s/Idle 120s/Write off), SetTimeouts/SetMaxConcurrency
- big-int-safe JSON in the generated TS client (>2^53 as BigInt)
- example/ demo services and cmd/genexample artifact generator

bugfix_test.go

@@ -39,7 +39,9 @@ func (s *BugSvc) Ticker() (string, *Stream, error) {
 func bugInvoke(t *testing.T, method string, data map[string]any) (*Result[any], error) {
 	t.Helper()
 	f := New()
-	f.BindService(&BugSvc{})
+	if err := f.BindService(&BugSvc{}); err != nil {
+		t.Fatal(err)
+	}
 	if data == nil {
 		data = map[string]any{}
 	}
@@ -76,7 +78,9 @@ func TestBugNullableEnum(t *testing.T) {
 // bug3: 含 () error 方法的代码生成不应 panic，且类型应生成为 Void/void
 func TestBugGenErrorOnly(t *testing.T) {
 	isolateGeneratorGlobals(t)
-	GetFun().BindService(&BugSvc{})
+	if err := GetFun().BindService(&BugSvc{}); err != nil {
+		t.Fatal(err)
+	}
 	SetOutput(t.TempDir())
 	GenCode(GenGo{}, GenTs{})
 	goSrc, err := os.ReadFile(filepath.Join(getDirectory(), "go", "bug_svc.go"))
@@ -98,7 +102,9 @@ func TestBugGenErrorOnly(t *testing.T) {
 // bug4+5: 响应键应为小写；(T, stream, error) 的 T 应作为流的第一条消息下发
 func TestBugJsonKeysAndStreamFirst(t *testing.T) {
 	f := New()
-	f.BindService(&BugSvc{})
+	if err := f.BindService(&BugSvc{}); err != nil {
+		t.Fatal(err)
+	}
 	go f.Start(39003)
 	time.Sleep(300 * time.Millisecond)
 
@@ -150,7 +156,9 @@ func (s *NullSlicSvc) Save(dto NullSlicDto) (string, error) { return "ok", nil }
 
 func TestBugSliceNull(t *testing.T) {
 	f := New()
-	f.BindService(&NullSlicSvc{})
+	if err := f.BindService(&NullSlicSvc{}); err != nil {
+		t.Fatal(err)
+	}
 	data := map[string]any{"tags": nil}
 	c := &Ctx{Ip: "1", MethodName: "Save", ServiceName: "NullSlicSvc", Data: &data}
 	var streamCh chan any
@@ -177,7 +185,9 @@ func (s *LeakSvc) Fail() (*Stream, error) {
 
 func TestBugStreamLeak(t *testing.T) {
 	f := New()
-	f.BindService(&LeakSvc{})
+	if err := f.BindService(&LeakSvc{}); err != nil {
+		t.Fatal(err)
+	}
 	c := &Ctx{Ip: "1", MethodName: "Fail", ServiceName: "LeakSvc"}
 	var streamCh chan any
 	var streamDone chan struct{}
@@ -202,7 +212,9 @@ func (s *CollideSvc) Cookie() (string, error) { return "cookie", nil }
 
 func TestBugMethodNameCollision(t *testing.T) {
 	f := New()
-	f.BindService(&CollideSvc{})
+	if err := f.BindService(&CollideSvc{}); err != nil {
+		t.Fatal(err)
+	}
 	if _, ok := f.methods["CollideSvc.Cookie"]; !ok {
 		t.Fatal("Cookie method dropped due to name collision with fasthttp.RequestCtx")
 	}