feat(TRA-335): license limits, per-customer branding, frontend, Gitea CI, and deployment README
- Added OrganizationProfile model with license_user_limit choices (20/50/100/1000), company_name, brand_logo_url
- Added migration 0003_organization_profile
- Admin-only REST endpoint GET/PATCH /api/v1/accounts/organizations/{org_id}/profile/
- OrganizationProfileSerializer, OrganizationProfileAdmin, factory, and integration tests
- Static Nginx-hostable frontend under frontend/public with configurable API_BASE_URL via config.js
- frontend/nginx.conf reference server config
- .gitea/workflows/ci.yml: ruff lint, pytest with Postgres/Redis services, docker build
- README.md: English deployment guide covering env vars, Docker Compose, migration, org profile API, frontend deploy
Co-Authored-By: Paperclip <noreply@paperclip.ing>
295ac1c31f