update corpus tests

[khieta]

Issue #, if available:

Description of changes:

Followup to #7 and #8, updating the corpus tests on main. This should be the last round of updates for now. Here are the results of the corpus comparison script:

	Original	New	Difference
Total test cases	1982	5096	3114
Unique policies	1048 ( 52.9% )	2605 ( 51.1% )	1557
Unique schemas	631 ( 31.8% )	2131 ( 41.8% )	1500
Unique entity stores	918 ( 46.3% )	2970 ( 58.3% )	2052
Entities per entity store	mean: 1 / median: 1 / p90: 2	mean: 1 / median: 1 / p90: 6	n/a
Schema entity types	mean: 1 / median: 1 / p90: 1	mean: 1 / median: 1 / p90: 5	n/a
Schema actions	mean: 1 / median: 1 / p90: 1	mean: 1 / median: 1 / p90: 1	n/a
Trivial policies	834 ( 42.1% )	2293 ( 45.0% )	1459
Pure RBAC (non-trivial) policies	436 ( 22.0% )	693 ( 13.6% )	257
Pure ABAC (non-trivial) policies	60 ( 3.0% )	90 ( 1.8% )	30

No idea why the previous corpus was so small. But we can track changes more easily now with the comparison script.

[khieta]

CI is passing, so marking as ready for review