fix(token-aggregation): emit Uniswap-schema token lists for mainnet cWUSDC

Normalize /report/token-list to checksummed addresses, version objects,
and extensions bag; add pinned static ethereum-mainnet list endpoint.

Co-authored-by: Cursor <cursoragent@cursor.com>

services/token-aggregation/src/api/utils/uniswap-token-list.test.ts

@@ -0,0 +1,76 @@
+import {
+  buildUniswapTokenList,
+  checksumTokenAddress,
+  normalizeTokenListVersion,
+  toUniswapTokenListToken,
+} from './uniswap-token-list';
+
+describe('uniswap-token-list utils', () => {
+  it('normalizes string versions into major/minor/patch objects', () => {
+    expect(normalizeTokenListVersion('1.2.3')).toEqual({ major: 1, minor: 2, patch: 3 });
+    expect(normalizeTokenListVersion({ major: 4, minor: 5, patch: 6 })).toEqual({
+      major: 4,
+      minor: 5,
+      patch: 6,
+    });
+  });
+
+  it('moves non-schema token fields into extensions and checksums addresses', () => {
+    const token = toUniswapTokenListToken(
+      {
+        chainId: 1,
+        address: '0x2de5f116bfce3d0f922d9c8351e0c5fc24b9284a',
+        symbol: 'cWUSDC',
+        name: 'USD Coin (Compliant Wrapped ISO-4217 M1)',
+        decimals: 6,
+        logoURI: 'https://d-bis.org/tokens/cwusdc.svg',
+        type: 'w',
+        registryFamily: 'iso4217',
+        originalLogoURI: 'https://example.com/logo.svg',
+      },
+      { displayNames: { cWUSDC: 'Wrapped cUSDC' } }
+    );
+
+    expect(token).toMatchObject({
+      chainId: 1,
+      address: '0x2de5F116bFcE3d0f922d9C8351e0c5Fc24b9284a',
+      symbol: 'cWUSDC',
+      name: 'Wrapped cUSDC',
+      decimals: 6,
+      logoURI: 'https://d-bis.org/tokens/cwusdc.svg',
+      extensions: {
+        type: 'w',
+        registryFamily: 'iso4217',
+        originalLogoURI: 'https://example.com/logo.svg',
+      },
+    });
+    expect(token).not.toHaveProperty('type');
+    expect(token).not.toHaveProperty('registryFamily');
+    expect(checksumTokenAddress('0x2de5f116bfce3d0f922d9c8351e0c5fc24b9284a')).toBe(
+      '0x2de5F116bFcE3d0f922d9C8351e0c5Fc24b9284a'
+    );
+  });
+
+  it('builds a schema-compliant list envelope', () => {
+    const list = buildUniswapTokenList({
+      name: 'DBIS Ethereum Mainnet GRU',
+      version: '1.1.0',
+      timestamp: '2026-06-06T00:00:00.000Z',
+      logoURI: 'https://d-bis.org/tokens/cwusdc.svg',
+      tokens: [
+        {
+          chainId: 1,
+          address: '0x2de5f116bfce3d0f922d9c8351e0c5fc24b9284a',
+          symbol: 'cWUSDC',
+          name: 'Wrapped cUSDC',
+          decimals: 6,
+          logoURI: 'https://d-bis.org/tokens/cwusdc.svg',
+        },
+      ],
+    });
+
+    expect(list.version).toEqual({ major: 1, minor: 1, patch: 0 });
+    expect(Array.isArray(list.tokens)).toBe(true);
+    expect((list.tokens as unknown[]).length).toBe(1);
+  });
+});