docs: Update changelog for 1.6.0 release

Author: rousso

CHANGELOG.md

@@ -1,12 +1,40 @@
-# eForms Core Library 1.5.0 Release Notes
+# eForms Core Library 1.6.0 Release Notes
 
-The eForms Core Library is a collection of utilities that are used by our sample applications as well as the EFX Toolkit for Java Developers.
+The eForms Core Library is a collection of utilities used by the EFX Toolkit for Java Developers and other eForms applications.
 
 ## In this release
 
-This release fixes an issue in the XPathProcessor that could cause a redundant predicate production when contextualising XPaths with multiple predicates.
+### SDK entity improvements
 
-The versions of various dependencies was updated: Apache Commons IO 2.19.0, Apache Commons Lang 3.18.0, Jackson 2.18.3, logback 1.5.18.
+- Versioned SDK entity classes (`SdkFieldV1`, `SdkFieldV2`, `SdkNodeV1`, `SdkNodeV2`, etc.) have been moved from the EFX Toolkit into the core library, consolidating version-specific implementations in a single location.
+- `SdkNode` now supports parent node references and ancestor chain traversal via `getAncestry()`. The return type is `List` (ordered) rather than `Set`.
+- `SdkField` now exposes repeatability information, parent node references, and parsed XPath metadata via `getXpathInfo()`.
+- Repository classes (`SdkNodeRepository`, `SdkFieldRepository`) now use two-pass loading to wire parent-child relationships during initialization.
+
+### Privacy and data type support
+
+- Added `PrivacySettings` to `SdkField`, providing access to privacy code, justification, publication date, and related field references.
+- Introduced `SdkDataType` entity and `SdkDataTypeRepository` for field type-level metadata including privacy masking values.
+- Separated `duration` as a distinct data type from `measure`.
+
+### Notice subtype management
+
+- Added `SdkNoticeSubtype` entity with intelligent ID parsing (prefix/number/suffix decomposition) and correct sorting order.
+- Added `SdkNoticeTypeRepository` to load and manage notice subtypes.
+- Renamed `getSdkNoticeType()` to `getSdkNoticeSubtype()` for semantic accuracy.
+
+### Utilities
+
+- Moved `NoticeDocument` and `SafeDocumentBuilder` from the eforms-notice-viewer into the core library. `NoticeDocument` provides secure XML parsing with accessors for notice subtype, SDK version, and language detection. `SafeDocumentBuilder` implements XXE prevention following OWASP guidelines.
+
+### Component registry
+
+- Added component types for dependency extraction (`EFX_COMPUTE_DEPENDENCY_EXTRACTOR`, `EFX_VALIDATION_DEPENDENCY_EXTRACTOR`) and EFX rules translation (`EFX_RULES_TRANSLATOR`).
+- Renamed `VALIDATOR_MARKUP_GENERATOR` to `VALIDATOR_GENERATOR`.
+
+### Dependencies
+
+- Updated versions of various dependencies.
 
 ## Download