revert: drop wire segment caps that silently truncated geometry

Remove MAX_SEGS_PER_WIRE = 100_000 and MAX_TOTAL_SEGS = 3_000_000.
These were stop-gap GPU-memory guards that mutated visible output:
single complex entities were cut mid-geometry, and entire wires past
the 3M total were dropped by arrival order with no spatial awareness.
Either is worse than honestly drawing whatever the file contains —
truncated arcs and missing road segments look like bugs to the user,
not "we ran out of GPU memory."

The matching "Temporary Workarounds" section in
RENDERING_OPTIMIZATION.md goes with them. Per-entity LOD and
viewport culling (Phase 1 + 3.2 in the same doc) remain the right
long-term answer; until they land, prefer correctness over a soft
crash on pathological files.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/scene/pipeline/mod.rs

@@ -600,36 +600,7 @@ impl Pipeline {
     }
 
     pub fn upload_wires(&mut self, device: &wgpu::Device, wires: &[WireModel]) {
-        // Total segment budget: prevents a large file from exhausting GPU memory.
-        // Each segment → 6 GPU vertices × 96 bytes = 576 bytes; 3M segs ≈ 1.6 GB.
-        const MAX_TOTAL_SEGS: usize = 3_000_000;
-        let mut total_segs = 0usize;
-        let mut skipped = 0usize;
-
-        self.gpu_wires = wires
-            .iter()
-            .filter(|w| {
-                let segs = w
-                    .points
-                    .len()
-                    .saturating_sub(1)
-                    .min(wire_gpu::MAX_SEGS_PER_WIRE);
-                if total_segs + segs > MAX_TOTAL_SEGS {
-                    skipped += 1;
-                    false
-                } else {
-                    total_segs += segs;
-                    true
-                }
-            })
-            .map(|w| WireGpu::new(device, w))
-            .collect();
-
-        if skipped > 0 {
-            eprintln!(
-                "[H7CAD] upload_wires: skipped {skipped} wire(s) — total segment budget ({MAX_TOTAL_SEGS}) exceeded"
-            );
-        }
+        self.gpu_wires = wires.iter().map(|w| WireGpu::new(device, w)).collect();
 
         // Full-brightness copies of selected wires, drawn on top of everything
         // in the selection overlay pass so they're always visible.