fix(core): escape dots in object keys when flattening to prevent path collision

[okxint]

Problem

Object keys that contain literal dots are misinterpreted as path separators when logs are stored and then displayed. For example:

logger.log("dimensions", { "Key 0.002mm": 31.4 })

Shows up in the dashboard as:

{ "Key 0": { "002mm": 31.4 } }

because the flatten step produces "Key 0.002mm": 31.4 and the unflatten step naively splits on every ..

Fixes #1510

Changes

packages/core/src/v3/utils/flattenAttributes.ts

• When building the flattened path key for plain object entries (line 208), escape dots in non-array keys: key.replace(/\./g, "\\."). Array indices use bracket notation and don't need escaping.
• Same escaping applied to Map string keys (line 123).
• Add splitOnUnescapedDots() helper that tokenizes a flattened key on unescaped dots and unescapes \. back to . in each segment.
• Switch unflattenAttributes to use splitOnUnescapedDots(key) instead of key.split(".").

packages/core/test/flattenAttributes.test.ts

• Add a regression test: { "Key 0.002mm": 31.4 } round-trips correctly through flatten → unflatten.
• Add a nested-key variant: { outer: { "a.b": { inner: 1 } } }.

How did you test this code?

Added two test cases in the existing flattenAttributes.test.ts that reproduce the exact scenario from the issue.

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[coderabbitai]

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📥 Commits

Reviewing files that changed from the base of the PR and between be45cf9 and b9f3ea2.

📒 Files selected for processing (2)

• packages/core/src/v3/utils/flattenAttributes.ts
• packages/core/test/flattenAttributes.test.ts

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Walkthrough

Updated attribute flattening to escape dots in string keys from Maps and objects. Added parsing that splits only on unescaped dots and restores literal dots during unflattening. Added tests covering simple and nested dotted object keys.

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• Create PR with unit tests

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