normalize assetIds for native assets

[bergarces]

Explanation

Normalizes native asset addresses.

References

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

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Note

Medium Risk
Changes the canonical native asset IDs produced by buildNativeAssetsFromConstant, which can affect cache/state keys and lookups if any consumers relied on the previous un-normalized IDs. Logic is small and test-covered, with normalization limited to EVM erc20 CAIP-19 IDs.

Overview
Native-asset seeding now normalizes each CAIP-19 native asset ID returned by buildNativeAssetsFromConstant using normalizeAssetId, aligning the seed map with IDs produced by other data sources (e.g., EIP-55 checksummed ERC-20 addresses).

Tests were updated to assert the normalized IDs, and the package changelog documents the fix.

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