feat(06-01): register athena council tool in runtime registry

- export createAthenaCouncilTool from tools index

- wire athena_council with agents.athena.council config in tool registry

src/plugin/tool-registry.ts

@@ -13,6 +13,7 @@ import {
   builtinTools,
   createBackgroundTools,
   createCallOmoAgent,
+  createAthenaCouncilTool,
   createLookAt,
   createSkillMcpTool,
   createSkillTool,
@@ -171,6 +172,11 @@ export function createToolRegistry(args: {
     pluginConfig.agents,
     pluginConfig.categories,
   )
+  const athenaCouncilConfig = pluginConfig.agents?.athena?.council
+  const athenaCouncilTool = createAthenaCouncilTool({
+    backgroundManager: managers.backgroundManager,
+    councilConfig: athenaCouncilConfig,
+  })
 
   const isMultimodalLookerEnabled = !(pluginConfig.disabled_agents ?? []).some(
     (agent) => agent.toLowerCase() === "multimodal-looker",
@@ -267,6 +273,7 @@ export function createToolRegistry(args: {
     ...factories.createSessionManagerTools(ctx),
     ...backgroundTools,
     call_omo_agent: callOmoAgent,
+    athena_council: athenaCouncilTool,
     ...(lookAt ? { look_at: lookAt } : {}),
     task: delegateTask,
     skill_mcp: skillMcpTool,