Remove chat rooms and agent loops before storage migration (#3053)

* refactor(storage): remove chat rooms and agent loops

This is the prerequisite cleanup for the storage backend migration. Legacy wire schemas remain temporarily so mixed-version peers can still parse old messages, while daemon callers now use query-shaped AgentStorage methods that can map directly to SQL later.

* test(cli): remove retired chat and loop coverage

packages/cli/src/cli.ts

@@ -1,8 +1,6 @@
 import { Command, Option } from "commander";
 import { createAgentCommand } from "./commands/agent/index.js";
 import { createDaemonCommand } from "./commands/daemon/index.js";
-import { createChatCommand } from "./commands/chat/index.js";
-import { createLoopCommand } from "./commands/loop/index.js";
 import { createPermitCommand } from "./commands/permit/index.js";
 import { createProviderCommand } from "./commands/provider/index.js";
 import { createScheduleCommand } from "./commands/schedule/index.js";
@@ -168,7 +166,6 @@ export function createCli(): Command {
   program.addCommand(createHubCommand());
 
   // Chat commands
-  program.addCommand(createChatCommand());
 
   // Terminal commands
   program.addCommand(createTerminalCommand());
@@ -176,9 +173,6 @@ export function createCli(): Command {
   // Workspace script commands
   program.addCommand(createScriptCommand());
 
-  // Loop commands
-  program.addCommand(createLoopCommand());
-
   // Schedule commands
   program.addCommand(createScheduleCommand());
   program.addCommand(createHeartbeatCommand());