docs(gfql): add temporal predicates documentation and notebook CI testing

.github/workflows/ci.yml

@@ -342,6 +342,8 @@ jobs:
     - uses: actions/checkout@v3
 
     - name: Test building docs
+      env:
+        VALIDATE_NOTEBOOK_EXECUTION: 0  # TODO: Enable once kernel setup is fixed
       run: |
         cd docs && ./ci.sh
 

CHANGELOG.md

@@ -7,11 +7,29 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 
 ## Dev
 
+### Added
+* GFQL temporal predicates and type system for date/time comparisons
+  * Support for datetime, date, and time comparisons with operators: `gt`, `lt`, `ge`, `le`, `eq`, `ne`, `between`, `is_in`
+  * Proper timezone handling for datetime comparisons
+  * Type-safe temporal value handling with TypeGuard annotations
+  * Temporal value classes: `DateTimeValue`, `DateValue`, `TimeValue` for explicit temporal types
+  * Wire protocol support for JSON serialization of temporal predicates
+  * Comprehensive documentation: datetime filtering guide, wire protocol reference, and examples notebook
+* Documentation build improvements:
+  * Added notebook CI testing infrastructure for validating example notebooks
+  * Structure validation ensures notebooks have required fields (execution_count)
+  * Optional execution validation to verify notebooks run without errors
+  * Currently validates temporal_predicates.ipynb and layout_tree.ipynb
+
 ### Breaking
 * Plottable is now a Protocol
 * py.typed added, type checking active on PyGraphistry!
 * transform() and transform_umap() now require some parameters to be keyword-only
 
+### Fixed
+* Fixed PlotterBase.py docstring formatting for spanner and kusto methods
+* Fixed temporal_predicates.ipynb notebook structure (removed outputs from markdown cells)
+
 ## [0.38.0 - 2025-06-17]
 
 ### Changed