feat: implement bridged asset canonical detection

Implements robust Ethereum canonical detection for bridged assets (WBTC, WETH, WSTETH, USDC, USDT, DAI).

- Add BRIDGED_CATEGORY_MAPPINGS for 6 Ethereum canonicals
- Implement three-way canonical detection via CoinGecko
- Prioritize CoinGecko over Zerion when Ethereum canonical detected
- Fix length <= 1 edge case to return canonical instead of undefined
- Merge USDT0 into USDT group via bridged-usdt category
- Deduplicate chain icons in grouped asset rows

Results:
- ETH WBTC/WETH/WSTETH/USDC/USDT are primaries (clean titles)
- All L2 bridged variants point to Ethereum canonicals
- USDT0 merged into USDT group
- No duplicate chain icons

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 (1M context) <[email protected]>

Author: gomesalexandre

scripts/generateAssetData/generateRelatedAssetIndex/generateRelatedAssetIndex.ts

@@ -346,7 +346,7 @@ const processRelatedAssetIds = async (
     (coingeckoDetectedCanonical
       ? coingeckoRelatedAssetsResult?.relatedAssetKey
       : zerionRelatedAssetsResult?.relatedAssetKey ||
-          coingeckoRelatedAssetsResult?.relatedAssetKey) ||
+        coingeckoRelatedAssetsResult?.relatedAssetKey) ||
     assetId
 
   // If the relatedAssetKey itself points to another key, follow the chain to find the actual key

src/lib/asset-service/service/encodedAssetData.json

@@ -300,7 +300,6 @@ export const clearAssetsMigrations = {
   253: clearAssets,
   254: clearAssets,
   255: clearAssets,
-  256: clearAssets,
 } as unknown as Omit<MigrationManifest, '_persist'>
 
 export const clearMarketDataMigrations = {