deploy(gitignore): uploads/* con eccezione .gitkeep, non più l'elenco (#38)

Copre anche le sottocartelle create a runtime (vision reference images,
cartelle per ricetta/versione), non solo le quattro elencate a mano.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.gitignore

@@ -33,19 +33,12 @@ env/
 Thumbs.db
 desktop.ini
 
-# Uploads (server-side files, now at project root)
-uploads/images/*
-uploads/pdfs/*
-uploads/logos/*
-uploads/reports/*
-uploads/general/
-# Statistics files emitted when a production is closed: shop-floor evidence, not
-# source. They live on the mounted volume in production.
-uploads/statistics/
-!uploads/images/.gitkeep
-!uploads/pdfs/.gitkeep
-!uploads/logos/.gitkeep
-!uploads/reports/.gitkeep
+# Uploads (server-side files, mounted as a volume in production): ignora tutto
+# sotto uploads/, comprese le sottocartelle create a runtime (vision reference
+# images, cartelle per ricetta/versione) — tieni solo i .gitkeep che mantengono
+# le cartelle vuote in git.
+uploads/*
+!uploads/**/.gitkeep
 
 # TailwindCSS output
 src/frontend/flask_app/static/css/tailwind.css