Ensure chunk get indexed when out of order with full length

[Bisaloo]

Fix #241

[github-actions]

This is how benchmark results would change (along with a 95% confidence interval in relative change) if 90ef77f is merged into devel:

• ✔️create_groups: 7.71ms -> 7.72ms [-0.84%, +1.03%]
• ✔️pkg_load: 233ms -> 234ms [-0.66%, +1.34%]
• ❗🐌read_blosc_lz4: 145ms -> 146ms [+1.02%, +1.54%]
• ✔️read_boolean: 6.58ms -> 6.44ms [-4.75%, +0.34%]
• ❗🐌read_c_order: 9.03ms -> 9.16ms [+1.08%, +1.97%]
• ✔️read_double: 8.72ms -> 8.64ms [-6%, +4.29%]
• 🚀read_empty: 5.85ms -> 5.8ms [-1.41%, -0.32%]
• ✔️read_float16: 7.89ms -> 7.89ms [-1.36%, +1.3%]
• ✔️read_float32: 7.87ms -> 7.91ms [-0.14%, +1.28%]
• ✔️read_int16: 7.89ms -> 7.84ms [-2.34%, +1.14%]
• ❗🐌read_int32: 8.46ms -> 8.59ms [+0.93%, +2.11%]
• ✔️read_int64: 8.61ms -> 8.59ms [-1.69%, +1.31%]
• ❗🐌read_int8: 7.83ms -> 7.99ms [+0.2%, +3.84%]
• ✔️read_lz4: 6.35ms -> 6.47ms [-0.6%, +4.63%]
• ✔️read_sharded: 9.52ms -> 9.55ms [-0.29%, +0.79%]
• ✔️read_string: 3.39ms -> 3.4ms [-0.51%, +1.02%]
• ❗🐌read_uint32: 8.42ms -> 8.48ms [+0.04%, +1.51%]
• ✔️read_uint64: 8.42ms -> 8.51ms [-0.22%, +2.27%]
• ✔️read_unicode: 3.37ms -> 3.29ms [-5.79%, +0.82%]
• ✔️read_vlen_utf8: 6.72ms -> 6.73ms [-1.2%, +1.4%]
• ✔️read_zlib: 6.27ms -> 6.25ms [-0.98%, +0.47%]
• ❗🐌read_zstd: 165ms -> 169ms [+1.97%, +2.43%]
• 🚀write_blosc_lz4: 186ms -> 186ms [-0.43%, -0.04%]
• ✔️write_bool: 9.36ms -> 9.37ms [-0.77%, +0.94%]
• ✔️write_double: 21.3ms -> 21.4ms [-0.18%, +0.85%]
• ✔️write_float32: 21.3ms -> 21.3ms [-0.73%, +0.58%]
• ✔️write_int16: 21.3ms -> 21.5ms [-0.27%, +2.21%]
• ✔️write_int32: 21.2ms -> 21.2ms [-0.29%, +0.59%]
• ❗🐌write_int8: 10.7ms -> 10.7ms [+0.17%, +1.55%]
• ✔️write_string: 8.99ms -> 9.04ms [-0.23%, +1.22%]
• ✔️write_unicode: 8.6ms -> 8.62ms [-0.62%, +1.12%]
• ✔️write_zstd: 214ms -> 214ms [-0.37%, +0.23%]
  Further explanation regarding interpretation and methodology can be found in the documentation.