docs: mark classifier integration historical; fix shortform count

- INTEGRATION_GUIDE.md: rewritten as research notes — how to reproduce the
  cluster classification with the analysis scripts, and why it was removed
  from the tool in v1.3.0
- analysis/README.md: integration section marked historical
- bicorder-app/README.md: shortform is 9 gradients, not 10

bicorder-app/README.md

@@ -6,7 +6,7 @@ A Svelte Progressive Web App (PWA) for carrying out protocol diagnostics as defi
 
 - **Single-page diagnostic tool** with ASCII-styled interface
 - **Touch-friendly controls** optimized for mobile devices
-- **Shortform toggle** - switch between full (23 gradients) and short (10 gradients) versions
+- **Shortform toggle** - switch between full (23 gradients) and short (9 gradients) versions
 - **Tooltips** on all gradient terms (long-press on mobile, hover on desktop)
 - **Editable metadata** fields with auto-generated timestamps
 - **Auto-calculated analysis** section (hardness/softness, polarized/centrist)