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/Computer-Architecture-Labs-71/directory-structure.json -filter -diff -merge text
-_course_archive/Computer-Architecture-Labs-71/README.md -filter -diff -merge text
-
-# BEGIN course-upload-20261025-16
-"/补充资料-杂项-20261025/**" filter=lfs diff=lfs merge=lfs -text
-"/_course_archive/Computer-Architecture-Labs-16-20261025/**" filter=lfs diff=lfs merge=lfs -text
-/.gitattributes -filter -diff -merge text
-"/_course_archive/Computer-Architecture-Labs-16-20261025/directory-structure.json" -filter -diff -merge text
-"/_course_archive/Computer-Architecture-Labs-16-20261025/README.md" -filter -diff -merge text
-# END course-upload-20261025-16
+version https://git-lfs.github.com/spec/v1
+oid sha256:4549a38f599fab9f8e4b6903cf10e7b70cd88133927feeb492fb49abc040d1b2
+size 811

_course_archive/Computer-Architecture-Labs-16-20261025/README.md

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b47bbeea00020b46d7ce2af3e414ab6397c3f352295b0899852a88163a9e4097
+size 455

_course_archive/Computer-Architecture-Labs-16-20261025/directory-structure.json

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e90b8e970b24819eda0a5e2ff0da1a50ab0eaee7820e3d5e24b03b890f809d25
+size 8732