feat: sync bot keyboards and callbacks

Sync telesrv b96f2dd (feat(bot): complete keyboards callbacks and durable delivery).

Skipped private docs and preserved public README files per sync rules; normalized the appearance seed log label for public naming.

internal/store/memory/message_markup_test.go

@@ -0,0 +1,43 @@
+package memory
+
+import (
+	"context"
+	"testing"
+
+	"telesrv/internal/domain"
+)
+
+func TestPrivateReplyKeyboardSurvivesBothBoxesAndHistory(t *testing.T) {
+	store := NewMessageStore(NewDialogStore())
+	markup := &domain.MessageReplyMarkup{
+		Type:        domain.MessageReplyMarkupKeyboard,
+		Keyboard:    [][]domain.MarkupButton{{{Type: domain.MarkupButtonText, Text: "Help"}}},
+		Resize:      true,
+		SingleUse:   true,
+		Persistent:  true,
+		Placeholder: "Choose",
+	}
+	res, err := store.SendPrivateText(context.Background(), domain.SendPrivateTextRequest{
+		SenderUserID: 10, RecipientUserID: 20, RandomID: 30,
+		Message: "pick", Date: 40, ReplyMarkup: markup,
+	})
+	if err != nil {
+		t.Fatalf("SendPrivateText: %v", err)
+	}
+	assertReplyKeyboard := func(name string, got *domain.MessageReplyMarkup) {
+		t.Helper()
+		if got == nil || got.Kind() != domain.MessageReplyMarkupKeyboard || len(got.Keyboard) != 1 ||
+			len(got.Keyboard[0]) != 1 || got.Keyboard[0][0].Text != "Help" || !got.Resize ||
+			!got.SingleUse || !got.Persistent || got.Placeholder != "Choose" {
+			t.Fatalf("%s = %#v", name, got)
+		}
+	}
+	assertReplyKeyboard("sender", res.SenderMessage.ReplyMarkup)
+	assertReplyKeyboard("recipient", res.RecipientMessage.ReplyMarkup)
+	markup.Keyboard[0][0].Text = "mutated"
+	list, err := store.GetByIDs(context.Background(), 20, []int{res.RecipientMessage.ID})
+	if err != nil || len(list.Messages) != 1 {
+		t.Fatalf("GetByIDs = %+v, %v", list, err)
+	}
+	assertReplyKeyboard("recipient history", list.Messages[0].ReplyMarkup)
+}