Fix return in finally block silently suppressing exceptions

[Otman404]

Summary

Move return results out of the finally block in MemoryAdaptiveDispatcher.run_urls since it was silently suppressing any exception propagating from the try or except blocks

List of files changed and why

1. crawl4ai/async_dispatcher.py - Moved return results from inside the finally block to after it in MemoryAdaptiveDispatcher.run_urls

before

        finally:
            # Clean up
            memory_monitor.cancel()
            if self.monitor:
                self.monitor.stop()
            return results

after

        finally:
            # Clean up
            memory_monitor.cancel()
            if self.monitor:
                self.monitor.stop()
        return results

2. same file - Re-raise exceptions after logging in the except block

before

  except Exception as e:
      if self.monitor:
          self.monitor.update_memory_status(f"QUEUE_ERROR: {str(e)}")

after

  except Exception as e:
      if self.monitor:
          self.monitor.update_memory_status(f"QUEUE_ERROR: {str(e)}")
      raise

How Has This Been Tested?

9/10 existing tests pass. The one failure (test_monitor_integration)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added/updated unit tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes