fix(athena): remove dead temperature/permission fields from council launch pipeline

LaunchInput.temperature and LaunchInput.permission were accepted and
passed through the council orchestrator but never forwarded to the
actual promptAsync API call (SDK doesn't support per-request temperature
or permission). Remove the dead fields, the unused AthenaConfig
interface, and update tests/docs/schema accordingly.

src/config/schema/athena.ts

@@ -14,7 +14,6 @@ const ModelStringSchema = z
 
 export const CouncilMemberSchema = z.object({
   model: ModelStringSchema,
-  temperature: z.number().min(0).max(2).optional(),
   variant: z.string().optional(),
   name: z.string().optional(),
 })