477 history migration not working

[yflim]

SUMMARY

Include historical datoms in datahike.migrate export, so history is not lost in migration as would happen currently. #477

Checks

Bugfix

• Related issues linked using fixes #number
• Integration tests added
• Architecture Decision Record added if design changes necessary
• Formatting checked
• CHANGELOG.md updated

[yflim]

I'm benchmarking 3 approaches: based on wanderung.datahike, sorting using the Scicloj Tablecloth API, and vanilla Clojure sorting.

Benchmarking parameters used were backend and index type, consisting of (in order) mem i.e. persistent-set or hitchhiker-tree indices, or file; and number of entities, in this case 0, 1000, 10000, 100000, or 1000000. All the approaches triggered an out-of-memory error at the 1M-entity stage, though the Wanderung approach failed sooner, failing at the persistent-set stage, whereas the others failed at hht.

[jsmassa]

Thanks for cleaning up the benchmark namespaces a bit. In the future, please make things like that a separate PR though with an appropriate subject.

[yflim]

export-db-clj consistently performed far better in speed (and also memory usage, though that hasn't been quantified) than the other approaches, export-db-wanderung and export-db-tc—see attached pretty-printed comparison map. Moreover, (I've just noticed) the latter doesn't support byte arrays, which is likely a dealbreaker. So I've replaced export-db with export-db-clj in commit 33a8c1a.
export-approach-figures.txt