That way we can feed lots of entropy into the table creation.
The bh64_key is derived from the id_key (NOT the crypt_key), thus
it will create the same key for related repositories (even if they
use different encryption/authentication keys). Due to that, it will
also create the same buzhash64 table, will cut chunks at the same
points and deduplication will work amongst the related repositories.
Only compare the main version number, e.g. 1.1.1 (first 3 elements
of the version tuple).
Without this change, it would not accept 1.1.1rc1 because that is
not "<= (1, 1, 1)" in that simplistic version comparison.
Separated `chunker_test` into two dedicated test modules: `fixed_test` (for `ChunkerFixed`) and `buzhash_test` (for `Chunker`). Updated imports and adjusted references accordingly.
Moved the `ChunkerFixed` implementation from `chunker` to a new `fixed` module for better modularity. Updated imports and type hints.
Removed now empty chunkers.chunker module.
Moved the `ChunkerFailing` implementation from `chunker` to a new `failing` module for better modularity. Updated imports and type hints. Adjusted related definitions in `chunker.pyi` accordingly.
Moved `buzhash` implementation from `chunker` to a new `buzhash` module for better separation of concerns. Updated imports, adjusted `setup.py` and build configuration accordingly. Removed deprecated `Chunker` definitions from `chunker.pyi`.
Relocated `get_chunker` function from `chunker` module to `chunkers.__init__.py` for improved organization. Updated `Chunker` class signature to include a `sparse` parameter with a default value. Adjusted imports and type hints accordingly.
Extracted the `reader` logic from `chunker` into a dedicated `reader` module to improve modularity and maintainability. Updated imports, references, and build configurations accordingly.
ChunkerFixed can be configured to support files with a specific header size.
But we do not want to get an AssertionError if we encounter a 0-byte file
or a file that is shorter than the header size.
