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niksis02
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Once a bucket had any policy, `verifyResourceAccess` evaluated the policy alone and ignored the bucket ACL, so a non-root bucket owner kept only what the policy explicitly allowed. A Deny-only policy (e.g. Deny `*` `s3:GetObject` on one prefix) therefore locked the owner out of every operation, including `DeleteBucketPolicy`, and only root/admin could recover. ACL grants also authorized every bucket operation through the controller's `AclPermission`, so a non-owner with a `WRITE` grant could install a bucket policy that locked out the owner and every other grantee. The policy and the ACL are now combined per action the way AWS does it: an explicit policy Deny wins, and otherwise the action is allowed by either a policy Allow or an ACL grant. The bucket owner keeps everything a policy doesn't explicitly deny and, like an AWS account root user, can always call `GetBucketPolicy`, `PutBucketPolicy` and `DeleteBucketPolicy` even past a Deny. The protection covers only those three APIs; `GetBucketPolicyStatus` and every other action stay deniable, matching AWS. ACL grants to non-owners now follow AWS's ACL-to-action mapping through the new `aclActionPermissions` table: `READ` grants `s3:ListBucket`, `s3:ListBucketVersions`, `s3:ListBucketMultipartUploads`, `s3:GetObject`, `s3:GetObjectVersion` and `s3:GetObjectAttributes`; `WRITE` grants `s3:PutObject` and `s3:DeleteObject`; `READ_ACP` and `WRITE_ACP` grant reading and writing the bucket and object ACLs. Bucket configuration, the bucket policy, tagging, object lock settings and `DeleteBucket` are the owner's alone unless a policy grants them. `verifyACL` is replaced by `aclAllows`, which derives the required permission from the action, so `AccessOptions.AclPermission` now only feeds the readonly gate. The anonymous path uses the same table in place of `publicACLAllowedActions`, which leaves its behavior unchanged. `GetBucketPolicyStatus` also reported a Deny-only `Principal: "*"` policy as public; only Allow statements now count toward `IsPublic`.