v0.9.0

Added

• Fastest-first polyglot compute chain (Rust, Mojo, Julia, Go, Python) with
  per-backend parity gates registered in the aggregate reference suite for
  time-delayed Kuramoto integration, time-series Williams-Beer PID
  decomposition, combinatorial Hodge decomposition, and E/I-balance
  interaction typing.
• Plain-language introduction on the README and documentation landing page
  covering the problem, cross-domain applications, and value ahead of the
  technical and evidence boundaries.

Changed

• E/I balance now resolves into the four EI-Kuramoto interaction types.
• Williams-Beer PID rebuilt as a time-series redundancy and synergy estimator
  over a phase history, replacing the constant-target formulation that returned
  zero for all inputs.
• Hodge analysis replaced with a true combinatorial Hodge decomposition across
  the full polyglot chain.
• Version bumped to 0.9.0 across package metadata, the Rust workspace, the
  citation file, and the generated capability inventory.

Fixed

• Swarmalator coupling uses the canonical OHS inverse-distance repulsion across
  the full polyglot chain.
• Winding-number phase increments wrap to the documented (-pi, pi] interval.
• Poincare phase-section interpolation corrected and covered by a polyglot
  parity gate.