chore: disable LFS tracking for Nexa_Mat_Paper.pdf

.gitattributes

@@ -36,6 +36,6 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 multimodal/controller/nexa_mat_controller_qwen3_14b_stack_prod_candidate_20260518T221530Z/tokenizer.json filter=lfs diff=lfs merge=lfs -text
 multimodal/controller/nexa_mat_controller_fft_pilot_20260518T234148Z/final_model_merged/tokenizer.json filter=lfs diff=lfs merge=lfs -text
 NEXA_MAT_FULL_TECHNICAL_PAPER.pdf filter=lfs diff=lfs merge=lfs -text
-Nexa_Mat_Paper.pdf filter=lfs diff=lfs merge=lfs -text
+Nexa_Mat_Paper.pdf -filter -text
 figures/nexamat_profile_yield_vs_targets.png filter=lfs diff=lfs merge=lfs -text
 figures/nexamat_profile_geometry_rates.png filter=lfs diff=lfs merge=lfs -text