bszabo

## Description Describe what this pull request changes, and why. Include implications for people using this change. Design decisions and their rationales should be documented in the repo (docstring /...

Bszabo/tnl 10136 student course enrollment

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This is an incremental step towards teasing apart a course enrollment model out of the existing student model in `edx-platform`. These changes are intended to be non-breaking. Please fail the...

This PR is a "Take 2" on PR-10051 (which failed to deply). This PR fixes two earlier problems: 1) call method `info`, not `Info`, and instrument for performance measurement irrespective...