Audit log
- Add audit_log table (migration + schema) with index on created_at.
- Add auditLog service (writeAudit, getClientIp) and record events for backups
(create, restore, upload-restore, delete, auto-settings), admin actions
(users, OIDC, invites, system update, demo baseline, bag tracking, packing
template delete, addons), and auth (app settings, MFA enable/disable).
- Add GET /api/admin/audit-log with pagination; fix invite insert row id lookup.
- Add AuditLogPanel and Admin tab; adminApi.auditLog.
- Add admin.tabs.audit and admin.audit.* strings in all locale files.
Note: Rebase feature branches so new DB migrations stay after existing ones
(e.g. file_links) when merging upstream.
Files can now be linked to multiple bookings and places simultaneously
via a new file_links junction table. Booking modal includes a file picker
to link existing uploads. Unlinking removes the association without
deleting the file.
Admins can create one-time registration links (1–5× or unlimited uses)
with optional expiry (1d–14d or never). Recipients can register even
when public registration is disabled. Atomic usage counting prevents
race conditions, all endpoints are rate-limited.