fix(metadata): keep custom fields named like Object.prototype properties

[dlasecki-box]

key in merged also matched inherited properties, so custom fields named constructor, toString and similar were dropped. The merge now uses Object.prototype.hasOwnProperty.call so these fields are kept.

Summary by CodeRabbit

• Bug Fixes
  • Custom metadata fields named constructor or toString continue to merge correctly, while system fields remain unchanged.
  • Custom metadata fields named __proto__ are now preserved as ordinary fields during merging, without changing the merged result’s prototype.

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Configuration used: Organization UI

Review profile: CHILL

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Run ID: a06cda0a-b272-47d8-a52d-7071a8554b13

📥 Commits

Reviewing files that changed from the base of the PR and between aa079d1 and 6085fff.

📒 Files selected for processing (2)

• src/api/__tests__/utils.test.js
• src/api/utils.js

🚧 Files skipped from review as they are similar to previous changes (2)

• src/api/tests/utils.test.js
• src/api/utils.js

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Walkthrough

The metadata merge now creates missing fields as own data properties. A test verifies that a hydrated __proto__ field remains an own property and does not change the result's prototype.

Changes

Metadata merge

Layer / File(s)	Summary
Missing metadata property handling src/api/utils.js, src/api/__tests__/utils.test.js	The merge function uses Object.defineProperty to create missing metadata fields. The test confirms that __proto__ is an own field with the expected value and that the result retains Object.prototype.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~8 minutes

Change: Bug fix

Suggested reviewers: greg-in-a-box

Merge Risk: ⚪ Minimal · up to 6085f

Custom metadata fields with inherited-property names have no identified merge-blocking risk after normal checks.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the main change: preserving custom metadata fields that match Object.prototype properties.
Description check	✅ Passed	The description explains the defect and the implemented fix. It is consistent with the pull request objective and retains the repository template instructions.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 2…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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🔧 Biome (2.5.12)

src/api/utils.js

File contains syntax errors that prevent linting: Line 7: 'import type' are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 8: 'import type' are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 10: 'import type' are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 28: Type annotations are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 28: return type annotation are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 41: Type annotations are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 41: Type annotations are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 41: return type annotation are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax

... [truncated 3113 characters] ...

pt file or remove the syntax.; Line 105: expected => but instead found ); Line 111: Type annotations are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 112: Type annotations are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 113: return type annotation are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 114: type annotation are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 125: type annotation are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 153: Type annotations are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.

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_{A rabbit checks each field with care,
A __proto__ key stays there.
No prototype takes a turn,
The test confirms what we can learn.
Soft paws hop through merged metadata,
Then rest beneath the moonlit data.}

_{Comment @coderabbitai help to get the list of available commands.}

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

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Inline comments:
In `@src/api/utils.js`:
- Line 139: In the missing-field branch that checks `merged` with
`hasOwnProperty`, create each metadata field as an own data property rather than
assigning through `merged[key]`, so a JSON-parsed `__proto__` key is preserved
without changing the prototype. Add a regression test using a JSON-parsed
`__proto__` key.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: 6f74777b-329b-4d8f-898c-5595b3e3aaf9

📥 Commits

Reviewing files that changed from the base of the PR and between f743f06 and aa079d1.

📒 Files selected for processing (2)

• src/api/__tests__/utils.test.js
• src/api/utils.js

Included review availability: Your plan provides up to 4 included reviews per hour; 3 remain after this review.