Changelog

v0.2.0

Added #[non_exhaustive] to extensible public enums such as MarkerPosition, TemplateExpansionError, IssueLevel, BuiltinEncoding, and PayloadError.
Added Display implementations for developer-facing public types including PayloadDb, Grammar, ExpandedPayload, Payload, PayloadConfig, and related helper types.
Added # Thread Safety sections across the public API to state whether each type is Send, Sync, or implementation-defined.
Added #[must_use] to important constructors and value-returning APIs that are easy to ignore by accident.