fix: robust layer fetch (multi-fallback page sizes, error cause), neutral 505 color

LAYER FETCH:
- fetchAllLayerByWhere now falls back through 2000 → 1000 → 500 → 200
  instead of just 2000 → 1000 before giving up
- 500ms delay between fallback attempts to let eTerra recover
- Error message now includes the original cause:
  'Failed to fetch layer TERENURI_ACTIVE: Session expired (401)'
  instead of just 'Failed to fetch layer TERENURI_ACTIVE'

DISPLAY:
- 505 terenuri count no longer green (was emerald-600, now neutral semibold)
  It's just a data value, not a status indicator

src/modules/parcel-sync/components/parcel-sync-module.tsx

@@ -2617,7 +2617,7 @@ export function ParcelSyncModule() {
                       <div className="flex-1 min-w-0">
                         <p className="text-sm">
                           Layer GIS:{" "}
-                          <span className="text-emerald-600 dark:text-emerald-400 font-semibold">
+                          <span className="font-semibold">
                             {noGeomScan.remoteGisCount.toLocaleString("ro-RO")}
                           </span>{" "}
                           terenuri