refactor(athena): use z.infer types from Zod schema, delete manual interfaces

src/agents/athena/index.ts

@@ -1,4 +1,3 @@
-export * from "./types"
 export * from "./agent"
 export * from "./council-member-agent"
 

src/agents/athena/types.ts

@@ -1,10 +0,0 @@
-export interface CouncilMemberConfig {
-  model: string
-  variant?: string
-  name: string
-  temperature?: number
-}
-
-export interface CouncilConfig {
-  members: CouncilMemberConfig[]
-}