feat(core): add HandleRaw and BasePath for trailing-slash routes

backend/core/extpoints/router_raw_test.go

@@ -0,0 +1,27 @@
+package extpoints
+
+import "testing"
+
+func TestHandleRawPreservesTrailingSlash(t *testing.T) {
+	r := &RouterRegistry{}
+	g := r.Group("/api/v1/nodes")
+
+	if got := g.BasePath(); got != "/api/v1/nodes" {
+		t.Fatalf("BasePath() = %q, want %q", got, "/api/v1/nodes")
+	}
+	slashless := g.Handle("GET", "")
+	slashed := g.HandleRaw("GET", "/")
+
+	if slashless.Path != "/api/v1/nodes" {
+		t.Errorf("Handle(\"\") path = %q, want %q", slashless.Path, "/api/v1/nodes")
+	}
+	if slashed.Path != "/api/v1/nodes/" {
+		t.Errorf("HandleRaw(\"/\") path = %q, want %q", slashed.Path, "/api/v1/nodes/")
+	}
+	if slashed.ID == slashless.ID {
+		t.Error("HandleRaw must allocate its own route ID")
+	}
+	if got := len(r.Routes()); got != 2 {
+		t.Errorf("registry routes = %d, want 2", got)
+	}
+}