feat: incremental archival builds

[marcelgerber]

Part of #4434.

This PR adds

• a DB table archived_chart_versions, keeping track of any archived versions
• hashing, based on the checksums of all indicators and the chart config (all coming from the DB)
• a detection of which graphers need to be incrementally rebuilt, based on these hashes and the DB table
• the generation of a more useful manifest

---

To run this:

yarn buildViteSite
VITE_PREVIEW=true npx tsx --tsconfig tsconfig.tsx.json ./baker/archival/archiveChangedGrapherPages.ts --latestDir
npx serve archive

Then navigate to http://localhost:3000.

The first run of this might take some time: on the staging server, it took 17 minutes.
Any runs after the first run are fast, as they are incremental (on staging: 5 seconds for one changed chart).

You can then change a grapher config in the admin, re-run the script, and see that it only re-archives that one changed grapher.

[github-actions]

A new Todo was discovered. If it is not a priority right now,consider marking it for later attention.
TODO: Turn into more specific type

• Ignore

[owidbot]

Quick links (staging server):

Site Dev	Site Preview	Admin	Wizard	Docs

Login: ssh owid@staging-site-archived-chart-versions

• Site-screenshots: https://github.com/owid/site-screenshots/compare/archived-chart-versions
• SVG tester: https://github.com/owid/owid-grapher-svgs/compare/archived-chart-versions

SVG tester:

Number of differences (default views): 0 ✅
Number of differences (all views): 0 ✅

Edited: 2025-02-18 20:57:55 UTC
Execution time: 1.21 seconds

[marcelgerber]

TODO for myself: clean up the archiveDir param - we don't really need it here
(same goes for below)

[marcelgerber]

Much of this has been moved into ArchivalBaker, but it's also changed enough that a re-review of that file might be useful.

[marcelgerber]

There's a curiosity here in that we re-bake variable files even if they didn't change (their checksums are the same), but the grapher config of an underlying chart changed.

What's happening in practice is that the variable file is then re-fetched, re-hashed, and is then overriding the existing file under the same name.

It's not ideal, but in the grand scheme of things it's not a worry also - the median incremental update will probably touch less than 10 charts and less than 20 variables or so.

[marcelgerber]

Note to self: Currently, this just makes latest be the exact same as the latest timestamp folder.
We'll want to change this to be cumulative: Copy all files contained in [latestDate] over, but don't delete any of the others already contained in latest.

[marcelgerber]

You can see an example of a manifest here: http://staging-site-archived-chart-versions:3000/20250218-211057/grapher/access-to-basic-services.manifest.json (behind Tailscale)