rugnux: the whole-spot-list rung does not overflow the cloud's reserve

The rung that reads every spot of a frame passes SIZE_MAX as the per-image cap, and the
accumulated cloud reserved max_spots_per_image * images - which overflows and throws
length_error out of vector::reserve, killing the run. The count held is already tracked
exactly, so reserve that.

image_analysis/rotation_indexer/RotationIndexer.cpp

@@ -131,7 +131,7 @@ void RotationIndexer::RunIndexing() {
         return;
 
     std::vector<Coord> coords;
-    coords.reserve(max_spots_per_image * v_.size());
+    coords.reserve(accumulated_spots);   // the exact count held; the per-image cap may be SIZE_MAX
 
     for (int i = 0; i < v_.size(); i++) {
         const float angle_deg = angle_deg_[i].value_or(axis_->GetAngle_deg(i) + axis_->GetWedge_deg() / 2.0f);
@@ -173,7 +173,7 @@ void RotationIndexer::RunIndexing() {
         // Re-accumulate the reciprocal spots under a refined geometry/axis, to score a refined cell.
         auto accumulate = [&](const DiffractionGeometry &g, const std::optional<GoniometerAxis> &ax) {
             std::vector<Coord> c;
-            c.reserve(max_spots_per_image * v_.size());
+            c.reserve(accumulated_spots);
             for (int i = 0; i < v_.size(); i++) {
                 const float a = angle_deg_[i].value_or(ax->GetAngle_deg(i) + ax->GetWedge_deg() / 2.0f);
                 const auto rot = ax->GetTransformationAngle(a);