Initial commit: Imperva WAF demo lab

Flight-booking app scaffolded from the source running on the GCP host,
plus the four-screen frontend and three OWASP attack endpoints (SQLi,
reflected XSS, path traversal) built and locally verified against a
live uvicorn/vite dev pair. Includes deploy.sh (local build -> ship
over ssh -> swap on host) and docs/ carried over from the handoff.

backend/boarding_passes/BP-1001.txt

@@ -0,0 +1,11 @@
+====================================
+   OUTER SPACE FLIGHTS - BOARDING PASS
+====================================
+Passenger:   J. DOE
+Flight:      OUT101
+Route:       Earth (JFK) -> Lunar Gateway
+Departs:     2026-08-14 09:00
+Seat:        14C
+Gate:        G7
+Status:      CONFIRMED
+====================================