[ENH] Add automatic grid value updates and improve octree deserialization

[Leguark]

Description

This pull request improves grid value synchronization by adding automatic updates when grid properties change. The changes include:

• Added _update_values() call in set_active_grid() function to ensure grid values are refreshed when active grids are modified
• Implemented __setattr__ method in the Grid class to automatically trigger value updates when active_grids property is changed
• Enhanced octree grid initialization during model deserialization by calling set_regular_grid() with proper extent, resolution, and transform parameters
• Fixed field annotation in the Topography class by using Annotated type hint for the values_2d field
• Updated test snapshots to reflect new configuration defaults, including the addition of compute_scalar: true and removal of debug_water_tight field

Checklist

• My code uses type hinting for function and method arguments and return values.
• I have created tests which cover my code.
• The test code either 1. demonstrates at least one valuable use case (e.g. integration tests)
  or 2. verifies that outputs are as expected for given inputs (e.g. unit tests).
• New tests pass locally with my changes.

[Leguark]

• [ENH] Add automatic grid value updates and improve octree deserialization #1089 👈 (View in Graphite)
• main

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[graphite-app]

Graphite Automations

"Add gempy label" took an action on this PR • (03/23/26)

1 label was added to this PR based on Miguel de la Varga's automation.