Update CHANGELOG.md

Author: raold

CHANGELOG.md

@@ -1,4 +1,4 @@
-## [Unreleased]
+## [v1.3.0]
 ### Added
 - Test suite now fully mocks OpenAI embedding and Qdrant vector DB for all integration tests. No real API keys or running Qdrant instance are required for tests. This is achieved by:
   - Patching `get_openai_embedding` to return a fixed vector in all test files.
@@ -55,4 +55,4 @@
 - Enhanced documentation and cross-linking for all features.
 
 ### Fixed
-- Ensured all endpoints and integrations are robustly tested and isolated from external dependencies in CI. 
+- Ensured all endpoints and integrations are robustly tested and isolated from external dependencies in CI.