fix(telegram): inject tenant_id into command handler context

All Telegram bot commands (/writers, /addwriter, /removewriter, /reset,
/tasks, /task_detail) and callback queries were missing tenant_id in
context, causing "tenant_id required" errors from scopeClause() or
silent fallback to MasterTenantID breaking multi-tenant isolation.

internal/channels/telegram/commands.go

@@ -58,6 +58,9 @@ func (c *Channel) handleBotCommand(ctx context.Context, message *telego.Message,
 
 	cmd = strings.SplitN(cmd, "@", 2)[0]
 
+	// Inject tenant scope so all command handlers have tenant_id in context.
+	ctx = store.WithTenantID(ctx, c.TenantID())
+
 	chatIDObj := tu.ID(chatID)
 
 	// Helper: set MessageThreadID on outgoing messages for forum topics.

internal/channels/telegram/commands_tasks.go

@@ -196,6 +196,9 @@ func (c *Channel) handleTaskDetail(ctx context.Context, chatID int64, text strin
 // handleCallbackQuery handles inline keyboard button presses.
 func (c *Channel) handleCallbackQuery(ctx context.Context, query *telego.CallbackQuery) {
 	// Always answer to dismiss the loading indicator.
+	// Inject tenant scope (callback queries bypass handleBotCommand).
+	ctx = store.WithTenantID(ctx, c.TenantID())
+
 	c.bot.AnswerCallbackQuery(ctx, &telego.AnswerCallbackQueryParams{
 		CallbackQueryID: query.ID,
 	})