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As XRPL network demand grows and ledger sizes increase, the default 4K NuDB block size becomes a performance bottleneck, especially on high-performance storage systems. Modern SSDs and enterprise storage often perform better with larger block sizes, but rippled previously had no way to configure this parameter. This change therefore implements configurable NuDB block size support, allowing operators to optimize storage performance based on their hardware configuration. The feature adds a new `nudb_block_size` configuration parameter that enables block sizes from 4K to 32K bytes, with comprehensive validation and backward compatibility. Specific changes are: - Implements `parseBlockSize()` function with validation. - Adds `nudb_block_size` configuration parameter. - Supports block sizes from 4K to 32K (power of 2). - Adds comprehensive logging and error handling. - Maintains backward compatibility with 4K default. - Adds unit tests for block size validation. - Updates configuration documentation with performance guidance. - Marks feature as experimental. - Applies code formatting fixes. Co-authored-by: Bart Thomee <11445373+bthomee@users.noreply.github.com>