Allow custom optimizations runs for contract verifications via API

CHANGELOG.md

@@ -24,6 +24,7 @@
 - [#4579](https://github.com/blockscout/blockscout/pull/4579) - Write contract page: Resize inputs; Improve multiplier selector
 
 ### Fixes
+- [#4853](https://github.com/blockscout/blockscout/pull/4853) - Allow custom optimizations runs for contract verifications via API
 - [#4840](https://github.com/blockscout/blockscout/pull/4840) - Replace Enum.dedup with Enum.uniq where actually uniq items are expected
 - [#4835](https://github.com/blockscout/blockscout/pull/4835) - Fix view for broken token icons
 - [#4830](https://github.com/blockscout/blockscout/pull/4830) - Speed up txs per day chart data collection

apps/block_scout_web/lib/block_scout_web/controllers/api/rpc/contract_controller.ex

@@ -461,7 +461,13 @@ defmodule BlockScoutWeb.API.RPC.ContractController do
   end
 
   defp parse_optimization_runs({:ok, %{"optimization_runs" => runs} = opts}) when is_bitstring(runs) do
-    {:ok, Map.put(opts, "optimization_runs", 200)}
+    case Integer.parse(runs) do
+      {runs_int, _} ->
+        {:ok, Map.put(opts, "optimization_runs", runs_int)}
+
+      _ ->
+        {:ok, Map.put(opts, "optimization_runs", 200)}
+    end
   end
 
   defp parse_optimization_runs({:ok, %{"optimization_runs" => runs} = opts}) when is_integer(runs) do