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/bot_callback.go

@@ -0,0 +1,36 @@
+package store
+
+import (
+	"context"
+	"time"
+
+	"telesrv/internal/domain"
+)
+
+// BotCallbackPending is the short-lived, protocol-neutral ownership record for
+// one messages.getBotCallbackAnswer request. It is deliberately ephemeral: the
+// durable Bot API update remains in BotAPIUpdateStore, while this record only
+// coordinates the synchronous client answer across server instances.
+type BotCallbackPending struct {
+	QueryID   int64
+	BotUserID int64
+	UserID    int64
+	CreatedAt time.Time
+}
+
+type BotCallbackAnswerPush struct {
+	QueryID   int64
+	BotUserID int64
+	Answer    domain.BotCallbackAnswer
+}
+
+// BotCallbackRegistryStore coordinates callback waiters across processes.
+// Implementations must make Put and Resolve atomic: query ids cannot be
+// overwritten and at most one answer may win for the owning bot.
+type BotCallbackRegistryStore interface {
+	PutBotCallbackPending(ctx context.Context, pending BotCallbackPending, ttl time.Duration) (bool, error)
+	ResolveBotCallback(ctx context.Context, botUserID, queryID int64, answer domain.BotCallbackAnswer) (bool, error)
+	GetBotCallbackAnswer(ctx context.Context, botUserID, queryID int64) (domain.BotCallbackAnswer, bool, error)
+	DeleteBotCallbackPending(ctx context.Context, botUserID, queryID int64) error
+	SubscribeBotCallbackAnswers(ctx context.Context, handle func(context.Context, BotCallbackAnswerPush)) error
+}