dsh-codex-shared-pool: Codex Multi-account Pool Plugin for DSH

dsh-codex-shared-pool is a community extension package for DeepSeek Harness (DSH) released under the MIT license. It aims to enhance Codex account management capabilities without modifying core code by utilizing public extension points. This plugin enables users to aggregate multiple Codex accounts into a local account pool, automatically selecting available accounts based on upstream model quotas before each request to avoid manual switching or copying the `auth.json` file. Its core features include adding accounts via an independent OAuth authorization chain, intelligent account scheduling (prioritizing accounts with sufficient quota and early reset times), in-process request flow logging (retaining only status and reasons without recording sensitive content), and preserving Codex's original capabilities such as reasoning and search. It can be configured after installation via Web settings or local TUI commands.