Deduplicate remix contest cards

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Summary

• Deduplicate remix contest parent track IDs returned by all/user contest list hooks while preserving API order
• Apply the same guard to profile contest lists that share the card rendering path
• Add focused unit coverage for deduping within and across paginated results

Tests

• npm run test -w @audius/common -- src/api/tan-query/events/utils.test.ts --run
• ../../node_modules/.bin/eslint --no-cache src/api/tan-query/events/utils.ts src/api/tan-query/events/useAllRemixContests.ts src/api/tan-query/events/useUserRemixContests.ts src/api/tan-query/events/utils.test.ts from packages/common

Note: npm run lint -w @audius/common -- --no-cache still fails on an unrelated existing Prettier issue in packages/common/src/store/storeContext.ts.

  

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