Add missing filters, orderings and columns to the super-admin Sessions page

Page: /admin/session. Source: report-sessions-data.md section 1. All <=26.4.0, no gating.

**Compute sessions tab** (compute_session_nodes):

- Filters: group_name (project by name), domain_name, access_key, full_name, status_info, result, created_at, terminated_at, cluster_mode, priority, images. Keep the Running/Finished radio and type tabs as they are.
- Orderings: status, terminated_at, project_id, access_key, priority, scheduled_at.
- Columns: terminated_at, result, status_info, domain_name (hidden by default where noisy).
- CSV export must forward the property filter, not only status/type.

**Pending sessions tab**: show queue_position — it is already fetched by the status tag fragment and thrown away.

JIRA Issue: FR-3915

Start at the /admin/session page and compare its implementation with report-sessions-data.md section 1. Trace the compute and pending sessions tabs, including the status tag fragment and CSV export, then add the specified filters, orderings, columns, property-filter forwarding, and queue_position display; done means the requested controls and values appear and export preserves the property filter.

Written by the indexing model from the issue text.