refactor: 将子模块转为普通目录，移除外部 git 依赖

- 移除 JEPA/lejepa-identifiability 子模块 gitlink
- 移除 research/multiply/MultiPLY 子模块 gitlink
- 删除 .gitmodules（不再有外部 URL 依赖）
- 两个目录内容作为普通文件纳入主仓库追踪
- 删除各自内部 .git 目录，消除嵌套 git 仓库

JEPA/lejepa-identifiability/experiments/slurm/launch_scaling.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+#SBATCH --job-name=lejepa_scale
+#SBATCH --output=logs/scale_%A_%a.out
+#SBATCH --error=logs/scale_%A_%a.err
+#SBATCH --partition=gpuq
+#SBATCH --qos=slow_nice
+#SBATCH --gres=gpu:v100:1
+#SBATCH --cpus-per-task=4
+#SBATCH --mem=16G
+#SBATCH --time=12:00:00     # ← bumped from 6h: 3 modes × 5 seeds = 15 runs per N
+#SBATCH --array=0-9   # 10 dims
+
+DIMS=(2 4 8 16 32 64 128 256 512 1024)
+SEEDS=(0 1 2 3 4)
+MODES=(lejepa whiten infonce)
+
+N=${DIMS[$SLURM_ARRAY_TASK_ID]}
+
+eval "$(conda shell.bash hook)"
+conda activate pytorch
+
+mkdir -p logs
+
+for MODE in "${MODES[@]}"; do
+    for SEED in "${SEEDS[@]}"; do
+        echo "N=${N} seed=${SEED} mode=${MODE}"
+        python -u run.py --config configs/scaling.yaml \
+            --N "${N}" --seed "${SEED}" --mode "${MODE}"
+    done
+done