Adds two traces and bumps nim-ethers (#761)

codex/codex.nim

@@ -62,11 +62,13 @@ type
 
 proc waitForSync(provider: Provider): Future[void] {.async.} =
   var sleepTime = 1
+  trace "Checking sync state of Ethereum provider..."
   while await provider.isSyncing:
     notice "Waiting for Ethereum provider to sync..."
     await sleepAsync(sleepTime.seconds)
     if sleepTime < 10:
       inc sleepTime
+  trace "Ethereum provider is synced."
 
 proc bootstrapInteractions(
   s: CodexServer): Future[void] {.async.} =

vendor/nim-ethers

@@ -1 +1 @@
-Subproject commit 43cef2f7caae3e81dad2b4d9084f4b7c1f3e0c21
+Subproject commit 5b170adcb1ffb1dbb273d1b7679bf3d9a08adb76