[TOOL-2764] Dashboard: Fix published contract version selector with duplicate versions (#5893)

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## PR-Codex overview
This PR focuses on refining the contract fetching logic to ensure that only unique published contracts are returned, specifically keeping the latest version of each contract.

### Detailed summary
- Introduced a new variable `publishedContracts` to store fulfilled responses.
- Added logic to filter out duplicate contracts by version, keeping only the latest occurrence.
- Returned the filtered list of unique published contracts.

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Author: MananTank

apps/dashboard/src/components/contract-components/fetch-contracts-with-versions.ts

@@ -47,7 +47,18 @@ export async function fetchPublishedContractVersions(
     ),
   );
 
-  return responses.filter((r) => r.status === "fulfilled").map((r) => r.value);
+  const publishedContracts = responses
+    .filter((r) => r.status === "fulfilled")
+    .map((r) => r.value);
+
+  // if there are two published contract with same version, keep the latest (first in list - list is already sorted) one
+  const uniquePublishedContracts = publishedContracts.filter(
+    (contract, idx, arr) =>
+      // if this is the first occurrence of this version in list - keep it
+      arr.findIndex((c) => c.version === contract.version) === idx,
+  );
+
+  return uniquePublishedContracts;
 }
 
 export async function fetchPublishedContractVersion(