fix: update OWASP ZAP download URL to use zap-archive repository

feat: upgrade scanner with route-middleware modeling, adaptive context triage, and memory scaling

feat: install and enable Joern static analysis in Dockerfile

Fix VibeSec pipeline logic bugs, routing, feedback store, and RLS test cases

fix(pipeline): resolve container port binding, checkov execution path, and secrets scanner test path filtration

fix(backend): update Dockerfile and layer7_validator to skip/adjust Joern

feat(validator): install Joern and promote to Tier 1.5 primary validation

debug: disable standard output buffering in Docker container to flush logs in real-time

feat: secure Python backend engine v2.0