Implement blackjack service finish round async

[jomlabs]

No description provided.

[github-actions]

Formatting Issues Detected!

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Error ./Project.App/Project.Api/Services/BlackjackService.cs - Was not formatted.
  ----------------------------- Expected: Around Line 423 -----------------------------
                      // Draw cards using the deck API service
                      List<CardDTO> drawnCards = await _deckApiService.DrawCards(
                          deckIdentifier,
  ----------------------------- Actual: Around Line 423 -----------------------------
                      // Draw cards using the deck API service
                      List<CardDTO> drawnCards = await _deckApiService.DrawCards(deckIdentifier, "dealer", 1);
                      
  
Error ./Project.App/Project.Api/Repositories/UserRepository.cs - Was not formatted.
  ----------------------------- Expected: Around Line 52 -----------------------------
  
          // Update user balance
          public async Task UpdateBalanceAsync(User user)
  ----------------------------- Actual: Around Line 52 -----------------------------
  
          // Update user balance·
          public async Task UpdateBalanceAsync(User user)
  
Checked 73 files in 769ms.

[alt-potato]

already implemented when i stole the entire service functionality back sorry :/