feat(web,store,latest): forced poll — Check now stamps a Series for the next Lane pass (#146)

The control writes series.force_poll_at (column landed in migration 0014)
and never commands the poller: pending is derived as force_poll_at >
latest_checked_at and self-clears because the check stamp is written before
the fetch. The due query's forced flag overrides the rest cutoff, the
Sighting-deferral and finished-only clauses, jumps the queue, and wakes a
sleeping browser Lane; it never overrides an empty series_url, the Bookmarks
join, the refusal backoff, the sidecar-down skip or the Lane gap.

ADRs: 0013-commands-through-the-database.

backend/internal/web/static/admin.css

@@ -281,6 +281,10 @@
   text-align: right;
 }
 
+.admin-sheet .tbl .c-act .ghost + .ghost {
+  margin-left: 12px;
+}
+
 .admin-sheet .tbl .trow > .confirm-row {
   grid-column: 1 / -1;
   padding: 10px 12px;
@@ -685,6 +689,12 @@
   text-transform: uppercase;
 }
 
+.admin-sheet .dform .field {
+  display: flex;
+  gap: 10px;
+  margin-top: 8px;
+}
+
 .admin-sheet .pausebar {
   display: flex;
   align-items: center;