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/website/src/components/landing-page.tsx

@@ -1157,19 +1157,6 @@ paseo run --host devbox:6767 "run the full test suite"
 paseo ls                           # list running agents
 paseo attach abc123                # stream live output
 paseo send abc123 "also add tests" # follow-up task`,
-  },
-  {
-    title: "Loops",
-    description:
-      "Have one agent do the work, another verify the result, and loop until it passes. Built-in, no shell scripting needed.",
-    code: `# Worker-verifier loop: fix tests until they pass
-paseo loop run "make all tests pass" \\
-  --verify "verify tests pass and the code is production-ready" \\
-  --verify-check "npm test" \\
-  --max-iterations 5
-
-paseo loop ls                        # list running loops
-paseo loop logs abc123               # stream loop output`,
   },
   {
     title: "Schedules",