CRAN release 0.34.0

• New parallel processing support:
  • attack() now features an n_workers argument, enabling parallel execution of attacker problems via the future.apply package (if available).
• protectTable() enhancements:
  • The function now exposes n_workers when using method = "SIMPLEHEURISTIC", allowing parallelized internal attacker calls (passed through to attack()).
  • Added argument attack_threshold for method = "SIMPLEHEURISTIC". This allows users to define the safety tolerance (as abs(upper - lower) > attack_threshold) directly when protecting tables.
• Documentation updates: Added explanations and performance warnings regarding RAM usage for parallel processing in the package vignette and function man-pages.
• Added a threshold argument to attack() for more flexible safety checks (defaults to 1e-8).
• Optimized internal create_m_matrix() for faster matrix construction and lower memory overhead.
• Refactored/Simplified internal parameter-generation
• Added a centralized "Cell Status Codes" section to sdcProblem documentation, explaining states like "z" (empty cells) and "w". This section is now reused across all functions that modify cell statuses (UserIssue #319)
• Significantly optimized contributing_indices() regarding running-time and memory usage