Snapshot 95 demo-tenant parsers (incl. stormshield) + un-ignore parsers/

The original upstream gitignores parsers/* on the assumption that each tenant
has its own set. This fork commits a working snapshot so the Parser Test Runner
and Parser Coverage features are usable out of the box.

Stormshield parser exercises the new SDL key=value scanner, pattern references,
and JS-style unquoted format keys added to backend/routers/quality.py.

.gitignore

@@ -6,10 +6,7 @@ node_modules/
 .next/
 frontend/out/
 pgdata/
-parsers/*.json
 data/
 
-# Tenant-synced parsers (downloaded via /api/quality/sync-from-sdl) -
-# do not commit; each tenant generates its own set
-parsers/*
-!parsers/.gitkeep
+# Parsers ARE committed in this fork (snapshot of the demo tenant).
+# .env still excluded for safety.