build
061101143
090101032
----
reference-liveness-block-decoder
 └── reference liveness block header
      ├── columnar block header
      │    ├── 00-01: x 01       # version 1
      │    ├── 01-03: x 0100     # 1 columns
      │    ├── 03-07: x 02000000 # 2 rows
      │    ├── 07-08: b 00000011 # col 0: bytes
      │    └── 08-12: x 0c000000 # col 0: page start 12
      ├── data for column 0 (bytes)
      │    ├── offsets table
      │    │    ├── 12-13: x 01 # encoding: 1b
      │    │    ├── 13-14: x 00 # data[0] = 0 [16 overall]
      │    │    ├── 14-15: x 09 # data[1] = 9 [25 overall]
      │    │    └── 15-16: x 12 # data[2] = 18 [34 overall]
      │    └── data
      │         ├── 16-25: x 303631313031313433 # data[0]: 061101143
      │         └── 25-34: x 303930313031303332 # data[1]: 090101032
      └── 34-35: x 00 # block padding byte
