release: testnet v0.25.0 (#3807)

## Summary

- Bump workspace version `0.24.0` → `0.25.0` (`Cargo.toml`,
`Cargo.lock`)
- Roll the `CHANGELOG.md` `Unreleased` section into `v0.25.0`

Testnet release tracking issue: #3806

## Testing Verification

- `cargo update --workspace --offline` regenerated `Cargo.lock` with
only the 13 in-tree crate versions bumped (no dependency drift)

Author: packethog

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 
 ## Unreleased
 
+## [v0.25.0](https://github.com/malbeclabs/doublezero/compare/client/v0.24.0...client/v0.25.0) - 2026-05-29
+
+### Breaking
+
 ### Changes
 
 - Controller

Cargo.lock

@@ -24,7 +24,7 @@ exclude = [
 resolver = "2"
 
 [workspace.package]
-version = "0.24.0"
+version = "0.25.0"
 authors = ["Malbec Labs <dev@malbeclabs.com>"]
 readme = "README.md"
 edition = "2021"