feat(validation): add SKR standard validation for account compliance

changelog.md

@@ -5,6 +5,23 @@ 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).
 
+## [1.1.0] - 2025-01-09
+
+### Added
+- SKR standard validation in postJournalEntry to ensure accounts match official SKR03/SKR04 data
+- Module-level Maps for O(1) SKR standard lookups
+- validateAccountsAgainstSKR method for checking account type and class compliance
+- Smart validation that allows SKR04 class 8 custom accounts
+- Warning logs for non-standard accounts and type/class mismatches
+
+### Fixed
+- Test isolation issues by adding timestamps to database names
+- SKR04 test using correct account mappings (9xxx equity accounts)
+
+### Changed
+- Enhanced README with accurate API documentation and testing instructions
+- Updated legal section to Task Venture Capital GmbH
+
 ## [1.0.0] - 2025-01-09
 
 ### Added