Add pointnet seed 2026 baseline checkpoints

pointnet/seed_2026/best_loss.pth

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+version https://git-lfs.github.com/spec/v1
+oid sha256:eeb9e73ebea6fe1ca1d03b8fe529016dc55f364cf33b3f0234ef2657f6060479
+size 101012499

pointnet/seed_2026/best_pmt_miou.pth

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+version https://git-lfs.github.com/spec/v1
+oid sha256:1217b8366b57c17a2f42e78274a51153ddfd64118929ccb9d12fae32d7cf9003
+size 101014295

pointnet/seed_2026/config.json

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+{
+  "architectures": [
+    "Stage1DirectBaseline"
+  ],
+  "backbone": "pointnet",
+  "best_loss": 867.9918560708447,
+  "best_pmt_miou": 0.5319662094116211,
+  "dataset": "ZXCCHENGXI/cstnet2_stage1_mini",
+  "epochs": 80,
+  "global_batch_size": 128,
+  "model_config": {
+    "attn_k": 16,
+    "attn_neighbors": 20,
+    "dgcnn_k": 20,
+    "feature_dim": 128,
+    "head_dropout": 0.2,
+    "head_hidden_dim": 128,
+    "model": "pointnet",
+    "pointmamba_depth": 2,
+    "pointmamba_group_size": 32,
+    "pointmamba_tokens": 128,
+    "pointmamba_width": 64,
+    "pointmlp_group_size": 24,
+    "pointnext_k": 24,
+    "pointtransformer_depth": 3,
+    "pointtransformer_k": 16,
+    "pointtransformer_width": 64
+  },
+  "model_type": "cstnet2_stage1_direct_baseline",
+  "per_gpu_batch_size": 32,
+  "point_count": 2048,
+  "precision": "bfloat16",
+  "recommended_checkpoint": "best_pmt_miou.pth",
+  "seed": 2026,
+  "source_code": "https://github.com/xcheng-tsinghua/cstnet2",
+  "world_size": 4
+}

pointnet/seed_2026/last.pth

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+version https://git-lfs.github.com/spec/v1
+oid sha256:2119b8d8394e259b065d76ed6fadd93a63327b9cf360274d5545aeb9278a3d8a
+size 101010254