v0.7.19

Fixed — the front page told the product's one rule a lie

A launch-readiness pass, reading everything a first visitor meets:

• The README's headline example was invented. "⚡ Mastering phase — Grade
  B+ … the network has stopped memorising and started generalising" — no
  version of the engine could produce it: epoch 7 of 20 is learning, and no
  template contains those words. It is now the bundled Keras demo, verbatim —
  its last epoch and what Epochix says about it — reproducible with
  epochix demo keras.
• The XGBoost example quoted a retired template — "below the best of
  0.0781" for a log loss that had got worse — and the SDK example
  crashed: it printed result.summary, an attribute parse()'s result does
  not have, and used pl without importing it. Both replaced with real output
  and working code.
• tests/unit/test_readme_examples.py now runs each marked README example
  through the real engine — the quoted story must be one of the phrasings the
  engine chooses between for exactly those numbers — and executes the SDK
  snippet as written. Verified to fail on the old sentence.
• LICENSE was a paraphrase of Apache 2.0, not its text, so GitHub listed
  the licence as "Other" while the README, PyPI and the Marketplace all said
  Apache-2.0. Both copies (repository and extension) are now the verbatim
  licence; the copyright line moves to NOTICE, which also credits the
  bundled Vazirmatn font (SIL OFL).
• The dashboard's parameter share read "0%" for real layers (896 and 650
  parameters in the demo) beside "100%" for the rest; it reads "<1%" and
  ">99%". The skill radar cut axis names to ten characters ("Val Accura",
  "Generalisa"); they are wrapped whole, grow outward from the plot, and fit
  their panel at phone width.
• CONTRIBUTING.md and the README told contributors to run a bare pytest,
  which AGENTS.md warns can silently test an installed copy; both use
  uv run, as CI does. The stale v0.1 planning list TASKS.md is gone from
  the repository root — ROADMAP.md and this changelog replaced it long ago.