Method unbanUser

src/services/moderationService.js:395–450

({
    guild,
    user,
    moderator,
    reason = 'No reason provided'
  })

  }

  static async unbanUser({
    guild,
    user,
    moderator,
    reason = 'No reason provided'
  }) {
    try {
      if (!guild || !user || !moderator) {
        throw new TitanBotError(
          'Missing required parameters',
          ErrorTypes.VALIDATION,
          'Guild, user, and moderator are required'
        );
      }

      const bans = await guild.bans.fetch();
      const banInfo = bans.get(user.id);

      if (!banInfo) {
        throw new TitanBotError(
          'User not banned',
          ErrorTypes.VALIDATION,
          `${user.tag} is not currently banned from this server`
        );
      }

      await guild.members.unban(user.id, reason);

      const caseId = await logModerationAction({
        client: guild.client,
        guild,
        event: {
          action: 'Member Unbanned',
          target: `${user.tag} (${user.id})`,
          executor: `${moderator.user.tag} (${moderator.id})`,
          reason,
          metadata: {
            userId: user.id,
            moderatorId: moderator.id
          }
        }
      });

      logger.info(`User unbanned: ${user.tag} by ${moderator.user.tag} in ${guild.name}`);
      
      return {
        success: true,
        caseId,
        user: user.tag,
        reason
      };
    } catch (error) {
      logger.error('Error unbanning user:', error);
      throw error;
    }
  }
}