feat(activity): one Activity page — runs, admin actions, server log and quota under one filter bar

The audit log, the server log and the admin quota view were three pages (the quota one a Stats tab),
each with its own filters, and the background runs had no list at all. Now one page ("Napló" /
"Activity") reads all four, each still its own table on the server: a shared bar (text, a period of
1 h to 90 days defaulting to 7, an account) and each tab's own filters, the whole view in the URL.
The old page ids open their tab.

Server side: the audit log and the new run list (`/api/admin/runs`) filter and page like the server
log, through one keyset helper (`routes/_keyset`) the log now shares; an audit row keeps the request
it was made in (migration 0111), so its log lines are a pivot away, as a run's are (`lrun`). The
quota breakdown takes since/until and one account. The Scheduler rows get a history button to their
job's runs.

Also fixed on the way: re-saving the value in force on the Configuration page staged its override
without committing it (the commit sat inside the audit branch), so the save was lost.

backend/alembic/versions/0111_audit_request_id.py

@@ -0,0 +1,28 @@
+"""An audit row keeps the request that made it
+
+Revision ID: 0111_audit_request_id
+Revises: 0110_intervals_in_sysconfig
+Create Date: 2026-10-18
+
+The activity page opens an admin action's log lines from its row: `audit_log.request_id` is the
+request the change was made in, the same id `log_events.request_id` carries. Older rows have none —
+the request that made them was never recorded.
+"""
+
+import sqlalchemy as sa
+from alembic import op
+
+revision: str = "0111_audit_request_id"
+down_revision: str | None = "0110_intervals_in_sysconfig"
+branch_labels: str | None = None
+depends_on: str | None = None
+
+
+def upgrade() -> None:
+    op.add_column("audit_log", sa.Column("request_id", sa.String(64)))
+    op.create_index("ix_audit_log_request_id", "audit_log", ["request_id"])
+
+
+def downgrade() -> None:
+    op.drop_index("ix_audit_log_request_id", table_name="audit_log")
+    op.drop_column("audit_log", "request_id")