remove frame_id

[simsong]

This is the massive database update that denormalizes tables, removing frame_id and using instead movie_id and frame_number as index. This is for the eventual move to DynamoDB as a storage engine.

Whereas all other database updates did not destroy information, that was just too hard to do. So this is a new schema version number and it requires that databases be wiped. Sorry!

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 84.30%. Comparing base (6bf6631) to head (0aa4d84). Report is 2 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #413 +/- ## ========================================== - Coverage 84.30% 84.30% -0.01% ========================================== Files 23 23 Lines 2651 2637 -14 ========================================== - Hits 2235 2223 -12 + Misses 416 414 -2 ```

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[simsong]

@sbarber2 — I meant to show this to you earlier. I'll be accepting it later this weekend.