Release CORNETO 1.0.0 RC4

[pablormier]

Summary

• add AnnNet-centered CellNOptDAG condition and result helpers
• add the LiverDREAM-derived AnnNet signaling tutorial
• clarify Data as the general CORNETO method data model
• add CORNETO 1.0.0 RC4 release notes

Validation

• 485 core tests passed and 34 skipped; the sandbox-blocked notebook test passed separately with local kernel permission
• Ruff check and format check passed
• Poetry metadata check passed
• strict Sphinx build passed with warnings treated as errors
• wheel and source distribution built and passed Twine validation
• AnnNet signaling tutorial executed all 29 cells in its pinned Pixi environment