Add changelog for v0.20251208.0 (#1904)

AI-assisted: Claude Code

Signed-off-by: Christian Berendt <[email protected]>

Author: berendt

CHANGELOG.md

@@ -5,6 +5,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [v0.20251208.0] - 2025-12-08
+
+### Changed
+- Add `--stuck-retry 1` to all openstack-image-manager calls to reduce temporary issues with the Hetzner Objectstore by automatically retrying stuck image downloads
+
+### Dependencies
+- fastapi 0.123.0 → 0.124.8
+
 ## [v0.20251205.0] - 2025-12-05
 
 ### Added