Add security scans (include infrastructure/ci-templates)
Adds the shared security scan jobs (Trivy, Gitleaks, Semgrep) from infrastructure/ci-templates.
- Findings are imported into DefectDojo (https://dojo.finsec.localdomain). The project inherits the CI variables
DEFECTDOJO_TOKENandTRIVY_TOKENfrom its group. - The jobs are
allow_failure, they never block the pipeline. - The commit carries
[ci skip], so opening this MR starts no pipeline; the scans run on the next push or merge request.
Created by finsec.localdomain/security/gitlab-rollout.py, see docs/security.md in the devops repository.