# Functions
AddToIncomingContext returns a new context derived from ctx that is annotated with an Id.
FromContext returns the request Id embedded in gRPC metadata stored in a context, if one is available.
FromContextOrMissing returns the request Id embedded in gRPC metadata stored in a context, if one is available.
StreamServerInterceptor returns an interceptor that annotates incoming gRPC requests with an Id.
UnaryServerInterceptor returns an interceptor that annotates incoming gRPC requests with an Id.
# Constants
MetadataKey is the HTTP header key using this key we use to store request ids.