Doc - Add Release note for v1.4.0 (#130)

* add release note for v1.4.0

Author: yukirora

docs/LuciaTrainingPlatform/blog/2025-11-28-release-1-4.md

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+---
+slug: release-ltp-v1.4
+title: Releasing Lucia Training Platform v1.4
+author: Lucia Training Platform Team
+tags: [ltp, announcement, release]
+---
+
+We are pleased to announce the official release of **Lucia Training Platform v1.4.0**!
+
+## Lucia Training Platform v1.4.0 Release Notes
+
+This release brings significant improvements across platform stability, inference capabilities, CI/CD automation, security enhancements, and user experience.
+
+## Platform Features & Stability
+- Fixed Blobfuse2 installation failure
+- Fixed slow portal response issues
+- Fixed deployment issues on arm64 architecture and bare metal machines
+- Added image regex to support valid image limitation
+- Added webportal plugin for cluster local storage
+- Added tolerance and priority class in cluster-local-storage
+- Created PostgreSQL backend and support backend switch with Kusto
+
+## Inference Plugin
+- Inference plugin support for model proxy
+- Added support for training/inference job type in restserver
+- Added support for training/inference job type in webportal
+- Support inference job type in model proxy
+
+## CI/CD
+- Added CI/CD workflow to build all service images
+- Enabled imagelist argument for image build script
+- Fixed copy error in building image process
+- Fix cicd errors when branch creation and building all images
+
+## Security
+- Upgraded Dockerfiles with latest system updates
+- Fixed credentials exposure in source code
+- Updated Cilium to latest version
+
+## User Experience
+- Added comprehensive user manual documentation
+- Improved Copilot test experience
+