v0.3.1

Added

• PTN Format: Human-readable text format (.ptn) for pattern serialization
  • ptn_format.dumps() / ptn_format.dump(): Serialize patterns to text
  • ptn_format.loads() / ptn_format.load(): Deserialize patterns from text
  • Format separates quantum instructions and classical feedforward processing
  • Timeslice markers [n] indicate parallel execution groups
  • Pauli measurements use compact notation (X +, Y -, Z +)
  • Non-Pauli measurements use plane+angle format (XY pi/4)
  • Support for node coordinates, logical observables, and inline comments
• Non-Unitary Parity Projection Example: Added examples/nonunitary_parity_projection.py demonstrating measurement-induced entanglement via a 3-node star graph parity projector

Fixed

• Qompiler: qompile() now validates a provided scheduler before pattern generation, so invalid manual schedules fail early with ValueError.