Module config 

Structs

PostgresServerConfig

RFC-017 Wave 8 Stage E1: Postgres connection parameters carried on ServerConfig when backend == BackendKind::Postgres.

ServerConfig

Server configuration, loaded from environment variables.

ValkeyServerConfig

RFC-017 Wave 8 Stage E4 (v0.8.0): Valkey connection parameters carried on ServerConfig when backend == BackendKind::Valkey.

Enums

BackendKind

RFC-017 Stage A: backend family selector. Default Valkey. At Stage E4 (v0.8.0) both Valkey and Postgres are first-class and boot without a dev-override; BACKEND_STAGE_READY remains in ff-server::server as defence-in-depth for future backend additions.

ConfigError

Configuration error.