Remove Thread.sleep chaos injection from CreditCardService

[Copilot]

CreditCardService.getAllCreditCards() contained an undocumented chaos line introducing up to 9 seconds of random latency on every invocation, causing backend response time degradation in production.

Change

• CreditCardService.java — removed the sleep injection:

  // Removed:
  try { Thread.sleep((long)(Math.random() * 9000)); } catch (InterruptedException e) { Thread.currentThread().interrupt(); }

  getAllCreditCards() now executes the H2 query and DTO mapping directly with no artificial delay.

[Copilot]

Pull request overview

This PR removes an artificial random delay from CreditCardService.getAllCreditCards(), restoring direct H2-backed retrieval and DTO mapping for the card catalog endpoint.

Changes:

• Removed undocumented Thread.sleep latency injection from getAllCreditCards().
• Preserved existing read-only transaction behavior and repository-to-DTO mapping.

Show a summary per file

File	Description
backend/src/main/java/com/threeriversbank/service/CreditCardService.java	Removes artificial random latency before fetching all credit cards from H2.

Copilot's findings

• Files reviewed: 1/1 changed files
• Comments generated: 0