Resolve versement reste-à-verser/sur-versé from the server proactively

The badge on a versement freelance row previously only got the correct
status once someone clicked it -- before that it could show "inconnu"
(or, worse, silently default to "ok") whenever its linked entrée wasn't
in the currently loaded sliding window, which is common: the entrée
that got paid can be dated years before or after the versement itself.

Also fixed a latent bug in the click path itself: toggleEntreeFilter()
passed the *entrée's* id to loadEntreeGroup(), which needs an
already-loaded row to find a starting nid for the server-side query --
if that entrée wasn't loaded (the exact case this is all about), the
lookup silently found nothing and did nothing. Split the fetch+merge
logic into fetchGroupFromNid() and let loadEntreeGroup() accept a
fallbackNid (the versement's own, always loaded) to start the
traversal from when the entrée itself isn't available locally --
LedgerStatsController::groupeEntree() finds the same connected
component either way.

New ensureLinkedReconciliationResolved(), triggered by a `rows` watcher
after every load/loadOlder/loadNewer, calls the same server-backed
resolution for every visible linkable row instead of waiting for a
click, deduplicated via resolvedLinkGroups so rows sharing an entrée
don't each trigger their own fetch.

Verified live: the LA MINE versement (own date 2022, linked entrées
dated 2023 and 2025) now shows "⚠ Sur-versé" immediately on page load
with zero clicks, where before it required manually opening the badge
first. Drill-down modal and the "Non liée" -> link-form click path both
still work; no console errors on repeated fresh loads.

web/modules/custom/figli_compta_ledger/templates/figli-compta-home.html.twig

@@ -220,7 +220,7 @@
                   class="figli-recon-badge is-clickable"
                   :class="linkStatusClasses(linkStatus(item).kind)"
                   :title="item.entreeLieeIds.length ? linkStatus(item).detail + ' -- cliquer pour voir la ou les entrées liées' : linkStatus(item).detail + ' -- cliquer pour lier une entrée client'"
-                  @click="item.entreeLieeIds.length ? toggleEntreeFilter(item.entreeLieeIds[0]) : openLinkForm(item.nid)"
+                  @click="item.entreeLieeIds.length ? toggleEntreeFilter(item.entreeLieeIds[0], item.nid) : openLinkForm(item.nid)"
                 >{{ linkStatus(item).kind === 'ok' ? '' : '⚠ ' }}{{ linkStatusLabel(linkStatus(item).kind) }}</span>
               </template>
             </td>