What is a high-level representation of the features or themes that are to be delivered in each release?

An Artifact on an Agile project can best be described as:

A newly formed scrum team wants to foster an environment of transparency and experimentation. The team decides to use a Kanban board to record and track encountered impediments. Emphasis is placed on how issues are resolved and the strategies for preventing them in the future.
Over time, what will be the result of this approach?

During a daily stand up meeting, a developer expresses concerns that the selected technology limits the number of concurrent users.
What should the agile team lead do?

A member of the development team is working on a prioritized non-functional requirement involving integrating with a 3rd party system This integration has not been done before on the project.
What should the project leader suggest?