Topology #6 — specialist members → peer_review → chair.

Each member independently analyses the input, then all members cross-review each other's outputs in a peer-review pass. The chair synthesizes.

Usage (module-form)

council =
  CouncilEx.Councils.Specialist.new(
    as: MyApp.SpecialistCouncil,
    members: [
      {:legal, MyApp.Members.Legal,   [provider: :openai, model: "gpt-4o-mini"]},
      {:tech,  MyApp.Members.Tech,    [provider: :openai, model: "gpt-4o-mini"]},
      {:biz,   MyApp.Members.Biz,     [provider: :openai, model: "gpt-4o-mini"]}
    ],
    chair: {MyApp.Members.Synth, [provider: :openai, model: "gpt-4o"]}
  )

Usage (dynamic / data-only form)

Returns a %CouncilEx.DynamicCouncil{} with the same topology — useful for runtime-built / DB-driven councils. Members and chair are described as plain maps (or %DynamicMember{} structs):

council =
  CouncilEx.Councils.Specialist.new_dynamic(
    id: "specialist-1",
    default_profile: "openai_mini",
    members: [
      %{id: "legal",   role: "Legal",   system_prompt: "..."},
      %{id: "tech",    role: "Tech",    system_prompt: "..."},
      %{id: "biz",     role: "Biz",     system_prompt: "..."}
    ],
    chair: %{id: "synth", role: "Synthesizer",
             system_prompt: "...", profile: "openai_balanced"}
  )