v0.2.4

ChenSignatures v0.2.4

Diff since v0.2.3

BREAKING:

• The old Python logsig(path, m) implementation (which computed the basis internally) has been removed.
• The Python logsig API now requires explicit basis preparation:
  prep = prepare_logsig(d, m)
  logsig(path, prep)
  A convenience wrapper still exists, but all computation now goes through the prepared basis.

New:

• Added basis caching support on the Python side to match the Julia prepare(d, m) → logsig(path, basis) workflow.
• Reworked Python package structure: tests moved to tests/, benchmarks moved to benchmarks/.
• Added optional dependency groups and made PyTorch optional.
• Removed iisignature due to build/compatibility issues.
• Added a full pytest suite including cached logsignature tests and PyTorch autograd tests.
• Added a two-tier CI configuration for fast checks and full coverage.

Version bump: v0.2.4

Merged pull requests:

• Increased waiting time for python registration (#28) (@aleCombi)
• Python restructuring (#29) (@aleCombi)