docs: update changelog for version 3.6.2

- Add Elasticsearch index_exists method documentation
- Document CI/CD pipeline enhancements
- Include Kafka test reliability improvements
- Add PostgreSQL DSN type safety fixes
- Document dependency updates and bug fixes
- Acknowledge community contributions

Author: HosseinNejatiJavaremi

docs/changelog.md

@@ -2,6 +2,76 @@
 
 All notable changes to ArchiPy are documented in this changelog, organized by version.
 
+## [3.6.2] - 2025-08-16
+
+### New Features
+
+#### Elasticsearch Index Management
+
+- **Index Existence Check** - Added `index_exists` method to Elasticsearch adapters for improved index management
+  - New `index_exists()` method in both synchronous and asynchronous Elasticsearch ports
+  - Enhanced index lifecycle management with proper existence validation
+  - Improved error handling and index operation safety
+  - Better support for index-dependent operations and workflows
+
+#### CI/CD Pipeline Enhancement
+
+- **Dedicated Test Workflow** - Implemented comprehensive CI/CD pipeline for automated testing
+  - Added dedicated GitHub Actions workflow for Behave BDD tests
+  - Automated test execution on push to main branch and pull requests
+  - Python 3.13 matrix testing with Poetry dependency management
+  - Enhanced test reliability and continuous integration capabilities
+
+### Improvements
+
+#### Testing Framework
+
+- **Kafka Test Reliability** - Enhanced Kafka adapter tests with retry mechanism for improved stability
+  - Implemented retry logic for Kafka connection tests to handle transient network issues
+  - Improved test reliability in CI/CD environments with better error handling
+  - Enhanced test coverage for Kafka adapter functionality
+
+#### Configuration Management
+
+- **PostgreSQL DSN Type Safety** - Fixed PostgresDsn type instantiation for improved configuration validation
+  - Corrected PostgresDsn type handling in configuration templates
+  - Enhanced type safety for database connection string validation
+  - Improved configuration error handling and validation
+
+#### Development Tools
+
+- **Dependency Updates** - Updated development dependencies for improved tooling and security
+  - Enhanced Poetry dependency management with latest package versions
+  - Improved development environment setup and tooling
+  - Better compatibility with Python 3.13 and modern development practices
+
+### Bug Fixes
+
+#### Test Infrastructure
+
+- **Image Version Compatibility** - Fixed test container image versions for improved test reliability
+  - Updated Elasticsearch, Keycloak, and Kafka test container images
+  - Resolved test environment compatibility issues
+  - Enhanced test stability across different environments
+
+#### Error Handling
+
+- **Exception Utility Assertions** - Fixed error assertion logic in exception utilities
+  - Corrected error handling in test scenarios for better validation
+  - Improved error message consistency and debugging capabilities
+
+### Dependencies
+
+- **Development Tools** - Updated development dependencies for improved tooling and security
+- **Test Containers** - Enhanced test container configurations for better test reliability
+- **CI/CD Tools** - Improved GitHub Actions workflow for automated testing
+
+### Community Contributions
+
+- **@heysaeid** - Fixed PostgresDsn type instantiation for improved configuration validation
+- **@negatic** - Enhanced Kafka adapter tests with retry mechanism and improved test infrastructure
+- **@s.kazemi** - Added index_exists method to Elasticsearch adapters and implemented CI/CD test workflow
+
 ## [3.6.1] - 2025-08-11
 
 ### New Features