hygiene fixes

[drernie]

1. no wildcards - only prefix-based auth!!!
2. rewrite README
3. Ensure CLAUDEs up to date
4. Expand proof for step 4 of proof
5. https://www.strongdm.com/cedar-policy-language
6. Proposal for policy store specification cedar-policy/rfcs#101
7. lint CEDAR (add Description)
8. Add multipart methods