fix: unsilence all error returns from SQL Exec, Bot API calls, and migrations

cmd/bot/main.go

@@ -61,7 +61,9 @@ func main() {
 	if url := os.Getenv("BOT_WEBHOOK_URL"); url != "" {
 		startWebhook(ctx, b, h, url)
 	} else {
-		b.DeleteWebhook(ctx, &tgbot.DeleteWebhookParams{})
+		if _, err := b.DeleteWebhook(ctx, &tgbot.DeleteWebhookParams{}); err != nil {
+			slog.Warn("failed to delete webhook", "error", err)
+		}
 		go dailyReportScheduler(ctx, h, dbStore)
 		slog.Info("bot started",
 			"allowed_users", len(allowedUsers),
@@ -105,6 +107,7 @@ func checkDailyReports(ctx context.Context, h *bot.Handler, store *db.Store) {
 
 		loc, err := time.LoadLocation(u.Timezone)
 		if err != nil {
+			slog.Error("invalid timezone for user, skipping report", "chat_id", u.ChatID, "timezone", u.Timezone, "error", err)
 			continue
 		}
 		localNow := now.In(loc)