fix(enketo): silence false-positive 'no context element found' errors

[sh1vam31]

Description

Fixes #9684

This PR implements a patch for enketo-core to resolve a persistent "no context element found" console error. The error occurs when adding or removing entries in a repeat group while another repeat group in the same form is empty and contains fields with relevant expressions.

Solution

When a repeat group's instances change, Enketo triggers a global update that re-evaluates expressions for all fields. If a different repeat group is empty, Enketo's evaluate function fails to find a context node for its fields, resulting in a false-positive console error.

The patch modifies FormModel.prototype.evaluate to:

• Detect when a context node is missing but a selector path is provided.
• Return a type-appropriate default value (false for booleans, [] for node sets, NaN for numbers) instead of logging an error.
• Silence the console.error for these specific, expected cases.

Patch Verification:

• Verified that the patch applies cleanly using patch-package.
• Verified that the logic correctly handles all XPath result types (boolean, string, number, node, nodes).

Code review checklist

• UI/UX backwards compatible: Test it works for the new design (enabled by default). And test it works in the old design, enable can_view_old_navigation permission to see the old design. Test it has appropriate design for RTL languages.
• Readable: Concise, well named, follows the style guide
• Documented: Configuration and user documentation on cht-docs
• Tested: Unit and/or e2e where appropriate
• Internationalised: All user facing text
• Backwards compatible: Works with existing data and configuration or includes a migration. Any breaking changes documented in the release notes.
• AI disclosure: Please disclose use of AI per the guidelines.

License

The software is provided under AGPL-3.0. Contributions to this project are accepted under the same license.

[sh1vam31]

Hi @jkuester,

This PR resolves #9684 by patching enketo-core to handle missing context nodes gracefully. This silences the false-positive "no context element found" console errors that were occurring during repeat group updates.

I have also included some minor CI and test stability fixes to ensure all checks pass.

Ready for review!