The summaries family is spoken by internal/memory, internal/morning and
internal/tasks. internal/phraser already imports internal/memory, so the
deck cannot stay in phraser without a cycle.
internal/say is a leaf: embed, json, math/rand, strings, sync. The four
phraser families keep their files and their floors and now call say.Load,
*say.Deck, Text, Matches, Variants, RequirePlaceholder and RegisterFloor.
No copy changed and no behaviour changed.
