Beta server and role come from the dashboard

The owner sets them on the admin page; the bot polls the shared beta_settings
row (30s) and moves the beta commands if the server changes. BETA_* env vars
are gone.

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>

internal/db/repos/settingsrepo/repo.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"database/sql"
 	"errors"
+	"strconv"
 
 	"github.com/jackc/pgx/v5/pgconn"
 )
@@ -401,3 +402,23 @@ func (r *Repo) SetMusicEnabled(ctx context.Context, guildID int64, enabled bool)
 	_, err := r.db.ExecContext(ctx, q, guildID, enabled)
 	return err
 }
+
+// GetBetaSettings returns the beta server and Beta Tester role as set on the
+// dashboard. Either is "" when not set (or when there's no row yet).
+func (r *Repo) GetBetaSettings(ctx context.Context) (guildID, roleID string, err error) {
+	var g, role sql.NullInt64
+	err = r.db.QueryRowContext(ctx, `SELECT guild_id, role_id FROM beta_settings WHERE id = TRUE`).Scan(&g, &role)
+	if errors.Is(err, sql.ErrNoRows) {
+		return "", "", nil
+	}
+	if err != nil {
+		return "", "", err
+	}
+	if g.Valid {
+		guildID = strconv.FormatInt(g.Int64, 10)
+	}
+	if role.Valid {
+		roleID = strconv.FormatInt(role.Int64, 10)
+	}
+	return guildID, roleID, nil
+}