feat: add --w-topo override to multiseed driver for topology ablation

configs/reproduce_ellphi_main.yaml

@@ -0,0 +1,48 @@
+# Post-fix ellphi multiseed main run (same hyperparams as reproduce.yaml; lighter viz I/O).
+# Pilot calibration uses reproduce.yaml; this config is for the 5-seed main phase.
+
+meta:
+  config_id: "reproduce_ellphi_main"
+
+model:
+  point_dim: 2
+  feature_dim: 128
+  ellipse_param_dim: 5
+  threshold: 0.5
+  topology_loss:
+    metric_type: "anisotropic"
+    distance_backend: "mahalanobis"
+    ellphi_differentiable: true
+
+loss:
+  w_class: 1.0
+  w_topo: 0.1
+  w_aniso: 0.01099204345474479
+  w_size: 0.0055785823086202556
+  pos_weight: 1.0
+  aniso_mode: "linear"
+
+training:
+  lr: 0.0004897466143769238
+  epochs: 50
+  grad_clip_value: 1.0
+  visualize_every: 10
+  warmup_epochs: 0
+  use_amp: true
+
+data:
+  max_points: 200
+  num_outliers: 20
+  seed: 42
+  test_size: 1000
+  num_workers: 4
+  batch_size: 64
+  pin_memory: true
+
+performance:
+  cudnn_benchmark: true
+  enable_tf32: true
+  matmul_precision: high
+
+outputs:
+  base_dir: "outputs"