fix(language): transitive field reference scoping

[sanny-io]

Fixes #2746

Summary by CodeRabbit

• New Features
  • Improved reference resolution for transitive field references.
  • Added field-aware scoping for referenced data models, enabling more accurate language tooling and validation.
  • Enhanced support for navigating and validating fields across related data models.
  • Improved recognition of valid field references when relationships span multiple models.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between e2f7ef7 and 3296d7f.

📒 Files selected for processing (1)

• packages/language/src/zmodel-scope.ts

🚧 Files skipped from review as they are similar to previous changes (1)

• packages/language/src/zmodel-scope.ts

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📝 Walkthrough

Walkthrough

The scope computation now resolves field references inside valid TransitiveFieldReference attributes against fields of the referenced data model. It validates the attribute parameter, containing field, and target model before creating the specialized scope.

Changes

Scope resolution

Layer / File(s)	Summary
Target model scope helpers packages/language/src/zmodel-scope.ts	Added helpers that validate transitive reference attributes, locate the containing field, identify its target data model, and create a field scope.
Reference target integration packages/language/src/zmodel-scope.ts	Reference targets now resolve against fields of the referenced data model when the target is valid.

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: ⚪ Minimal · up to 3296d

No actionable merge-blocking risk remains; the change is ready for normal checks and review.

Possibly related PRs

• zenstackhq/zenstack#2709: Both changes modify ZModelScopeComputation in zmodel-scope.ts.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the fix for transitive field-reference scoping, which is the main change in the pull request.
Linked Issues check	✅ Passed	The changes address issue #2746 by scoping relation reference autocomplete to fields from the referenced model.
Out of Scope Changes check	✅ Passed	The changes are limited to field-reference resolution and scoping required for the linked autocomplete fix.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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packages/language/src/zmodel-scope.ts

ESLint skipped: missing config or dependency (missing-dependency). The ESLint configuration references a package that is not available in the sandbox.

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Actionable comments posted: 1

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Inline comments:
In `@packages/language/src/zmodel-scope.ts`:
- Around line 278-280: Update getTransitiveFieldReferenceScope to build
descriptions from getAllFields(dm) instead of dm.fields, so inherited fields are
included in relation reference autocomplete while preserving the existing scope
creation behavior.

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Fix all unresolved CodeRabbit comments on this PR:

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: 6e4c87fc-750b-4575-99d1-116dfbcfdf5d

📥 Commits

Reviewing files that changed from the base of the PR and between 1390aa0 and e2f7ef7.

📒 Files selected for processing (1)

• packages/language/src/zmodel-scope.ts