v0.3.0-rc2

Release candidate 2 for Revit 2027. Built from 226235b (main after PRs #90–#93).

Install: unzip the file for your Revit year, run Install.ps1 (no admin). Needs WebView2 Evergreen. If Revit says Duplicated AddInId, delete a leftover RevitAiPoc.addin.

Verified in Revit 2027.2 (Snowdon model): create_family_instance height above the level (it now checks where Revit placed the instance and moves it), move_elements of a wall with its hosted door (moves once), color_by_parameter and view-override reset, tag_all, create_dimension, set_parameter in mm, reload_links (reload and missing-file failure), the ADR-0015 confirmation summary, and split_by_levels dry-run and write.

Known limits:

• split_by_levels on real walls that Revit has joined can roll the whole batch back with "Can't keep elements joined"; nothing is changed when that happens. Its failure text now names the blamed elements.
• split_by_levels cannot filter by level; "Level 1" in a model with several L1 levels needs explicit ids or a selection.
• An error-severity failure inside a split batch (R9) has no test.
• Revit 2027.2 needs DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=1 and DOTNET_SYSTEM_GLOBALIZATION_PREDEFINED_CULTURES_ONLY=0 to run the NUnit Revit tests (see src/LoadingAI.RevitTests/README.md).