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/domain/botapi_webhook.go

@@ -0,0 +1,21 @@
+package domain
+
+import "time"
+
+// BotAPIWebhook is durable delivery configuration and observable retry state.
+// The token secret is never stored here: authentication remains owned by BotProfile.
+type BotAPIWebhook struct {
+	BotUserID      int64
+	URL            string
+	SecretToken    string
+	MaxConnections int
+	AllowedUpdates []BotAPIUpdateKind
+	// AllowedUpdatesSet distinguishes an explicitly supplied (possibly empty)
+	// setWebhook parameter from omission, which must preserve the previous
+	// getUpdates/setWebhook policy atomically at the store boundary.
+	AllowedUpdatesSet bool
+	FailureCount      int
+	LastErrorDate     int
+	LastErrorMessage  string
+	NextAttemptAt     time.Time
+}