feat: add models for navigation events (FC-0033)

[SoryRawyer]

This PR adds a materialized view for navigation events and an accompanying view that enriches the MV with course and block metadata.

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[bmtcril]

I approved, but can you add docs for these as well, please?

[SoryRawyer]

Ah yes, sorry for the oversight. Also, since there could be either sequential or vertical blocks in these models, does it make sense to leave the fields block_id and block_name as-is? I wasn't sure what a more descriptive name would be.

[bmtcril]

Pretty sure this is good since I think we primarily use block_name_with_location, but let me know if I'm missing something

[SoryRawyer]

I can't think of anything. Thanks!

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@SoryRawyer 🎉 Your pull request was merged! Please take a moment to answer a two question survey so we can improve your experience in the future.

[bmtcril]

Released as v3.2.0