Add course directory manifest and upload notes

.gitattributes

@@ -1,15 +1,3 @@
-
-# Upload-only course archive
-* filter=lfs diff=lfs merge=lfs -text
-.gitattributes -filter -diff -merge text
-README.md -filter -diff -merge text
-_course_archive/Computational-Methods-60/directory-structure.json -filter -diff -merge text
-_course_archive/Computational-Methods-60/README.md -filter -diff -merge text
-
-# BEGIN course-upload-20261025-22
-"/补充资料-杂项-20261025/**" filter=lfs diff=lfs merge=lfs -text
-"/_course_archive/Computational-Methods-22-20261025/**" filter=lfs diff=lfs merge=lfs -text
-/.gitattributes -filter -diff -merge text
-"/_course_archive/Computational-Methods-22-20261025/directory-structure.json" -filter -diff -merge text
-"/_course_archive/Computational-Methods-22-20261025/README.md" -filter -diff -merge text
-# END course-upload-20261025-22
+version https://git-lfs.github.com/spec/v1
+oid sha256:193e04335b249c4dcb960d90b07a6b0dc50202e37b37d9fa855e58b71199d1b8
+size 786

_course_archive/Computational-Methods-22-20261025/README.md

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4b6872309e42f3ad74705df8701343e89311a2f42800338bd1e2811de47ae282
+size 434

_course_archive/Computational-Methods-22-20261025/directory-structure.json

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3da10d234034a03dad93ee4a6a18839321b126f5dd140390e77ae34e49f47129
+size 2876