Add course directory manifest and upload notes

.gitattributes

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-*tfevents* filter=lfs diff=lfs merge=lfs -text
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-*.sam filter=lfs diff=lfs merge=lfs -text
-*.raw filter=lfs diff=lfs merge=lfs -text
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-*.gif filter=lfs diff=lfs merge=lfs -text
-*.png filter=lfs diff=lfs merge=lfs -text
-*.tiff filter=lfs diff=lfs merge=lfs -text
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-*.jpg filter=lfs diff=lfs merge=lfs -text
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-*.webp filter=lfs diff=lfs merge=lfs -text
-# Video files - compressed
-*.mp4 filter=lfs diff=lfs merge=lfs -text
-*.webm filter=lfs diff=lfs merge=lfs -text
-
-# BEGIN course-upload-20261024-9
-* filter=lfs diff=lfs merge=lfs -text
-"/_course_archive/Pattern-Recognition-9-20261024/**" filter=lfs diff=lfs merge=lfs -text
-/.gitattributes -filter -diff -merge text
-"/_course_archive/Pattern-Recognition-9-20261024/directory-structure.json" -filter -diff -merge text
-"/_course_archive/Pattern-Recognition-9-20261024/README.md" -filter -diff -merge text
-/README.md -filter -diff -merge text
-# END course-upload-20261024-9
-
-# BEGIN course-upload-20261025-27
-"/补充资料-杂项-20261025/**" filter=lfs diff=lfs merge=lfs -text
-"/_course_archive/Pattern-Recognition-27-20261025/**" filter=lfs diff=lfs merge=lfs -text
-/.gitattributes -filter -diff -merge text
-"/_course_archive/Pattern-Recognition-27-20261025/directory-structure.json" -filter -diff -merge text
-"/_course_archive/Pattern-Recognition-27-20261025/README.md" -filter -diff -merge text
-# END course-upload-20261025-27
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