docs(readme): update Pascal/Delphi coverage 75.7% → 77.4% (#797)

The paren-less call extraction (#793) and free-routine attribution (#795)
added real call coverage on PascalCoin. Controlled A/B on a fresh clone,
same source-file filter, only the build differing:

  baseline (pre-Pascal-work, d21d2df): 75.79%  (≈ the documented 75.7%)
  current  (main, v18):                77.37%  (+1.58)

The baseline reproducing the documented 75.7% confirms the metric is the
same one the README table uses; the +1.58 is the measured coverage gain
from this session's Pascal extraction work.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

README.md

@@ -665,7 +665,7 @@ Impact and blast-radius queries are only as good as the dependency graph behind
 | Lua | nvim-telescope/telescope.nvim | 84.2% |
 | Luau | dphfox/Fusion | 92.2% |
 | Liquid | Shopify/dawn | 73.8% |
-| Pascal / Delphi | PascalCoin | 75.7% |
+| Pascal / Delphi | PascalCoin | 77.4% |
 
 Framework routing is validated the same way, on a canonical app per framework: Express 100%, FastAPI 98%, Flask 100%, NestJS 96.8%, Gin 96.5%, Axum 100%, Rocket 93.8%, Vapor 100%, Laravel 92%, Rails 89.6%, React Router 100% — and the convention/reflection-heavy ones at their honest static-analysis ceiling: ASP.NET 83.9%, Spring 83.3%, Drupal 78.9%, Django 74.1%.