chore(release): prepare v6.1.1

This release rolls the validated retry-path fixes into a publishable patch version after the merged server-overload and live server_error work landed on main.

The version bump is paired with a changelog entry and the retry-suite isolation fix so the release tree and the verified tree stay identical.

Constraint: npm already has oc-codex-multi-auth@6.1.0, so a new publish requires a new semver version
Rejected: Reuse 6.1.0 | npm registry rejects republishing an existing version
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: Do not tag or cut GitHub release artifacts for 6.1.1 until npm publish succeeds from the synced release worktree
Tested: npm run lint; npm run typecheck; npm run build; npm test
Not-tested: npm publish from this agent environment remains auth-gated

Author: ndycode

CHANGELOG.md

@@ -10,6 +10,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - (placeholder for next release)
 
+## [6.1.1] - 2026-04-22
+
+### Fixed
+- Retry structured `service_unavailable_error` / `server_is_overloaded` payloads as server faults even on non-5xx responses, while preserving overload `retry_after` backoff when the account pool is exhausted.
+- Retry live upstream `server_error` payloads that arrive on non-5xx responses instead of falling straight through as unrecoverable failures.
+- Stabilize merged retry regression coverage so the overload and live `server_error` fetch-loop cases do not leak module state between tests.
+
 ## [6.1.0] - 2026-04-17
 
 ### Added

package.json

@@ -1,6 +1,6 @@
 {
   "name": "oc-codex-multi-auth",
-  "version": "6.1.0",
+  "version": "6.1.1",
   "description": "OpenCode plugin for Codex-first GPT-5 workflows with ChatGPT Plus/Pro OAuth, multi-account rotation, and guided setup",
   "main": "./dist/index.js",
   "types": "./dist/index.d.ts",