chore: improve storage/ implementation; use log(...) consistently (#473)

This PR tidies up primitives under storage/.

**Noop changes:**

* Promote logger implementation to top-level utility outside of agent/
* Use logger within storage primitives
* Cleanup doc strings and comments

**Functional changes:**

* Increase command history size to 10_000
* Remove unnecessary debounce implementation and ensure a session ID is
created only once per agent loop

---------

Signed-off-by: Thibault Sottiaux <tibo@openai.com>

codex-cli/src/utils/agent/agent-loop.ts

@@ -10,8 +10,8 @@ import type {
 } from "openai/resources/responses/responses.mjs";
 import type { Reasoning } from "openai/resources.mjs";
 
-import { log } from "./log.js";
 import { OPENAI_TIMEOUT_MS, getApiKey, getBaseUrl } from "../config.js";
+import { log } from "../logger/log.js";
 import { parseToolCallArguments } from "../parsers.js";
 import { responsesCreateViaChatCompletions } from "../responses.js";
 import {