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/Engineering-Project-Management-35/directory-structure.json -filter -diff -merge text
-_course_archive/Engineering-Project-Management-35/README.md -filter -diff -merge text
-
-# BEGIN course-upload-20261027-5
-"/补充资料-Recovered-20261027/**" filter=lfs diff=lfs merge=lfs -text
-"/_course_archive/Engineering-Project-Management-5-20261027/**" filter=lfs diff=lfs merge=lfs -text
-/.gitattributes -filter -diff -merge text
-"/_course_archive/Engineering-Project-Management-5-20261027/directory-structure.json" -filter -diff -merge text
-"/_course_archive/Engineering-Project-Management-5-20261027/README.md" -filter -diff -merge text
-# END course-upload-20261027-5
+version https://git-lfs.github.com/spec/v1
+oid sha256:5a83e43d2e0c6a0e72439f68e95645e0113806471b89cbb7bca3a94be4ca88be
+size 829

_course_archive/Engineering-Project-Management-5-20261027/README.md

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:bb14bc20b876c76dfc970c92aa46fc28c9b6855e6e2f4f9fa2a623b94df9bb61
+size 625

_course_archive/Engineering-Project-Management-5-20261027/directory-structure.json

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c6a75c22e426cf388f7d70eb06f5a7906c92893b8e91034c0d8ac94ae1194b25
+size 540

_course_archive/Engineering-Project-Management-5-20261027/source-classification.json

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:21e68c8e6ec67d75643270cd79457cc2e0ea2dea2e5da9fd3fa3184777ff8c34
+size 445