Barrett Ruth 84e4a45911 refactor(oauth): async coroutine support, pure-Lua PKCE, server hardening ... Problem: OAuth module shelled out to openssl for PKCE, used blocking `vim.system():wait()`, had a weak `os.time()` PRNG seed, and the TCP callback server leaked on read errors with no timeout. Solution: Add `M.system()` coroutine wrapper and `M.async()` helper, replace openssl with `vim.fn.sha256` + `vim.base64.encode`, seed from `vim.uv.hrtime()`, add `close_server()` guard with 120s timeout, and close the server on read errors.		2026-03-05 11:18:36 -05:00
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pending	refactor(oauth): async coroutine support, pure-Lua PKCE, server hardening	2026-03-05 11:18:36 -05:00