refactor(entrypoint): move route registry into entrypoint context

Replace global routes registry with entrypoint-scoped pools and
context lookups, and centralize API/metrics startup in config state.

internal/entrypoint/types/context.go

@@ -0,0 +1,18 @@
+package entrypoint
+
+import (
+	"context"
+)
+
+type ContextKey struct{}
+
+func SetCtx(ctx interface{ SetValue(any, any) }, ep Entrypoint) {
+	ctx.SetValue(ContextKey{}, ep)
+}
+
+func FromCtx(ctx context.Context) Entrypoint {
+	if ep, ok := ctx.Value(ContextKey{}).(Entrypoint); ok {
+		return ep
+	}
+	return nil
+}

internal/entrypoint/types/entrypoint.go

@@ -0,0 +1,37 @@
+package entrypoint
+
+import (
+	"github.com/yusing/godoxy/internal/types"
+)
+
+type Entrypoint interface {
+	Config() *Config
+
+	DisablePoolsLog(v bool)
+
+	GetRoute(alias string) (types.Route, bool)
+	AddRoute(r types.Route)
+	IterRoutes(yield func(r types.Route) bool)
+	NumRoutes() int
+	RoutesByProvider() map[string][]types.Route
+
+	HTTPRoutes() PoolLike[types.HTTPRoute]
+	StreamRoutes() PoolLike[types.StreamRoute]
+	ExcludedRoutes() RWPoolLike[types.Route]
+
+	GetHealthInfo() map[string]types.HealthInfo
+	GetHealthInfoWithoutDetail() map[string]types.HealthInfoWithoutDetail
+	GetHealthInfoSimple() map[string]types.HealthStatus
+}
+
+type PoolLike[Route types.Route] interface {
+	Get(alias string) (Route, bool)
+	Iter(yield func(alias string, r Route) bool)
+	Size() int
+}
+
+type RWPoolLike[Route types.Route] interface {
+	PoolLike[Route]
+	Add(r Route)
+	Del(r Route)
+}