Initial alter table support for the JSON API

[simonw]

Refs:

• Alter table support for the JSON write API #2101

TODO:

• Treat initial table creation as alter: true for /-/create with rows
• Allow "alter": true for subsequent calls to /-/create if user has alter-table permission
• Document the above
• "alter": true support for /db/table/-/insert
• "alter": true support for /db/table/-/upsert
• "alter": true support for /db/table/rowid/-/update

📚 Documentation preview 📚: https://datasette--2261.org.readthedocs.build/en/2261/

[simonw]

Documentation:

• https://datasette--2261.org.readthedocs.build/en/2261/authentication.html#alter-table - the permission
• https://datasette--2261.org.readthedocs.build/en/2261/events.html#datasette.events.AlterTableEvent - the event

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (569aacd) 92.81% compared to head (75362fc) 92.56%.

❗ Current head 75362fc differs from pull request most recent head fd9dce0. Consider uploading reports for the commit fd9dce0 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2261      +/-   ##
==========================================
- Coverage   92.81%   92.56%   -0.26%     
==========================================
  Files          41       42       +1     
  Lines        6266     6331      +65     
==========================================
+ Hits         5816     5860      +44     
- Misses        450      471      +21     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.