feat(athena): add temperature support to council member schema

Allow per-member temperature overrides in council config. Adds temperature field to CouncilMemberSchema (0-2 range), CouncilMemberConfig type, and auto-generated JSON schema.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/agents/athena/types.ts

@@ -2,6 +2,7 @@ export interface CouncilMemberConfig {
   model: string
   variant?: string
   name?: string
+  temperature?: number
 }
 
 export interface CouncilConfig {