The context data extracted from a validated JWT, used for all policy checks.
Root represents a privileged system context that bypasses all RBAC checks.
NoUser represents an unauthenticated context (e.g. for reading the policy collection).
Parse a JWT token without verifying the signature.
Extracts claims from the payload section (base64url-decoded).
Useful on clients that only need to read claims without access to the signing key.