changelog: cover Codex MCP, migration binary, and subagent maintenance fixes

- (#81551) Codex app-server MCP server projection, thread rotation, resume resend (jalehman)
- (#81582) Codex migration uses managed codex binary (fuller-stack-dev)
- (#81498) Subagent registry sessions preserved through maintenance (ai-hpc)

CHANGELOG.md

@@ -11,6 +11,9 @@ Docs: https://docs.openclaw.ai
 
 ### Fixes
 
+- Codex app-server: project bundle and user MCP servers into Codex threads, rotate threads when an MCP server is disabled, scope bundle MCP injection to bundled servers, and resend user MCP config on resume so MCP changes take effect mid-session without restarting the agent. (#81551) Thanks @jalehman.
+- Codex migration: invoke the managed Codex binary instead of a stale system `codex` for source-config migration plans, so users running the bundled Codex runtime get plan output that matches the binary the gateway will actually use. (#81582) Thanks @fuller-stack-dev.
+- Subagents/maintenance: preserve pending subagent registry sessions during session-store cleanup, pruning, and disk-budget enforcement so in-flight subagent runs are not deleted by background maintenance before they complete. (#81498) Thanks @ai-hpc.
 - Control UI/chat: reconcile terminal and reconnect run cleanup with cached session activity, stale compaction/fallback indicators, and a compact composer run-status chip so completed or interrupted turns do not leave Stop active. Fixes #76874 and #64220; refs #71630. Thanks @BunsDev.
 - Maintainer tooling: clarify which pnpm test/check commands are safe locally versus inside Codex worktrees, routing linked-worktree gates through node wrappers and Crabbox/Testbox.
 - Auto-reply: preserve same-key ordering when debounced inbound work falls back to immediate flushes, so follow-up turns cannot overtake an active buffered flush.