Bump to 0.27.1 (#3874)

## Summary of Changes
- Version bump to 0.27.1 for a standalone patch release carrying the
revert of the NAT auto-allocate behavior (#3861, reverted in #3870).
- Moves the revert note from Unreleased into a v0.27.1 changelog
section.

## Testing Verification
- Cargo.lock regenerated via `cargo update --workspace`; same 13/13 line
shape as the 0.27.0 bump.

Author: ben-dz

CHANGELOG.md

@@ -8,6 +8,12 @@ All notable changes to this project will be documented in this file.
 
 ### Changes
 
+## [v0.27.1](https://github.com/malbeclabs/doublezero/compare/client/v0.27.0...client/v0.27.1) - 2026-06-10
+
+### Breaking
+
+### Changes
+
 - Client
   - Revert auto-enabling allocated-IP mode on `doublezero connect ibrl` behind NAT (#3861): the RFC1918 heuristic misfires on 1:1 NAT hosts where plain IBRL works, silently changing the user type.
 

Cargo.lock

@@ -24,7 +24,7 @@ exclude = [
 resolver = "2"
 
 [workspace.package]
-version = "0.27.0"
+version = "0.27.1"
 authors = ["Malbec Labs <dev@malbeclabs.com>"]
 readme = "README.md"
 edition = "2021"