Add *.png to Git LFS tracking and include missing images

- Add global *.png LFS rule to .gitattributes
- Add 3 new untracked PNG images

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitattributes

@@ -14,13 +14,11 @@
 *.ot filter=lfs diff=lfs merge=lfs -text
 *.parquet filter=lfs diff=lfs merge=lfs -text
 *.pb filter=lfs diff=lfs merge=lfs -text
- 
 *.pth filter=lfs diff=lfs merge=lfs -text
 *.rar filter=lfs diff=lfs merge=lfs -text
 saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.tar filter=lfs diff=lfs merge=lfs -text
 *.tar.* filter=lfs diff=lfs merge=lfs -text
- 
 *.npz filter=lfs diff=lfs merge=lfs -text
 *.npy filter=lfs diff=lfs merge=lfs -text
 *.h5 filter=lfs diff=lfs merge=lfs -text
@@ -40,9 +38,8 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 **/*ckpt*.index filter=lfs diff=lfs merge=lfs -text
 *.safetensors filter=lfs diff=lfs merge=lfs -text
 *.ckpt filter=lfs diff=lfs merge=lfs -text
- 
- 
 *.jpeg filter=lfs diff=lfs merge=lfs -text
+*.png filter=lfs diff=lfs merge=lfs -text
 *.bmp filter=lfs diff=lfs merge=lfs -text
 *.gif filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
@@ -65,7 +62,6 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.3gp filter=lfs diff=lfs merge=lfs -text
 *.wmv filter=lfs diff=lfs merge=lfs -text
 *.rmvb filter=lfs diff=lfs merge=lfs -text
- 
 *.ts filter=lfs diff=lfs merge=lfs -text
 *.mkv filter=lfs diff=lfs merge=lfs -text
 *.flash filter=lfs diff=lfs merge=lfs -text
@@ -87,7 +83,6 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 dataset_infos.json ignore
 *.csv filter=lfs diff=lfs merge=lfs -text
 *.tsv filter=lfs diff=lfs merge=lfs -text
-
 images/education_chemistry_00006.png filter=lfs diff=lfs merge=lfs -text
 images/education_chemistry_00010.png filter=lfs diff=lfs merge=lfs -text
 images/education_chemistry_00012.png filter=lfs diff=lfs merge=lfs -text
@@ -595,7 +590,6 @@ images/education_english_00034.png filter=lfs diff=lfs merge=lfs -text
 images/education_math_00067.png filter=lfs diff=lfs merge=lfs -text
 images/education_math_00065.png filter=lfs diff=lfs merge=lfs -text
 images/education_math_00066.png filter=lfs diff=lfs merge=lfs -text
-
 images/finance_research_report_00019.png filter=lfs diff=lfs merge=lfs -text
 images/finance_research_report_00020.png filter=lfs diff=lfs merge=lfs -text
 images/finance_research_report_00026.png filter=lfs diff=lfs merge=lfs -text
@@ -1102,7 +1096,6 @@ images/manufacturing_operation_sop_00016.png filter=lfs diff=lfs merge=lfs -text
 images/manufacturing_operation_sop_00020.png filter=lfs diff=lfs merge=lfs -text
 images/manufacturing_operation_sop_00015.png filter=lfs diff=lfs merge=lfs -text
 images/legal_legal_provision_00040.png filter=lfs diff=lfs merge=lfs -text
-
 images/research_academic_paper_00022.png filter=lfs diff=lfs merge=lfs -text
 images/manufacturing_operation_sop_00027.png filter=lfs diff=lfs merge=lfs -text
 images/manufacturing_operation_sop_00032.png filter=lfs diff=lfs merge=lfs -text
@@ -1473,4 +1466,20 @@ images/research_programming_book_00058.png filter=lfs diff=lfs merge=lfs -text
 images/research_programming_book_00060.png filter=lfs diff=lfs merge=lfs -text
 images/research_programming_book_00071.png filter=lfs diff=lfs merge=lfs -text
 images/research_programming_book_00073.png filter=lfs diff=lfs merge=lfs -text
-images/research_programming_book_00077.png filter=lfs diff=lfs merge=lfs -text
+images/research_programming_book_00077.png filter=lfs diff=lfs merge=lfs -text
+images/education_scanned_00046.png filter=lfs diff=lfs merge=lfs -text
+images/manufacturing_form_receipt_00014.png filter=lfs diff=lfs merge=lfs -text
+images/research_programming_book_00048.png filter=lfs diff=lfs merge=lfs -text
+images/education_chemistry_00028.png filter=lfs diff=lfs merge=lfs -text
+images/research_patent_00043.png filter=lfs diff=lfs merge=lfs -text
+images/research_programming_book_00092.png filter=lfs diff=lfs merge=lfs -text
+images/education_chemistry_00090.png filter=lfs diff=lfs merge=lfs -text
+images/legal_contract_00018.png filter=lfs diff=lfs merge=lfs -text
+images/legal_standard_00097.png filter=lfs diff=lfs merge=lfs -text
+images/research_academic_paper_00018.png filter=lfs diff=lfs merge=lfs -text
+images/education_chemistry_00093.png filter=lfs diff=lfs merge=lfs -text
+images/legal_legal_provision_00037.png filter=lfs diff=lfs merge=lfs -text
+images/manufacturing_form_receipt_00035.png filter=lfs diff=lfs merge=lfs -text
+images/manufacturing_form_receipt_00082.png filter=lfs diff=lfs merge=lfs -text
+images/research_patent_00034.png filter=lfs diff=lfs merge=lfs -text
+images/research_patent_00073.png filter=lfs diff=lfs merge=lfs -text