Update requirements.txt to include pyldap and update comments

api/requirements.txt

@@ -1,3 +1,4 @@
+# The Python virtual environment should be managed via the venv-manager utility, not directly by pip.
 # See: https://pip.pypa.io/en/stable/reference/pip_install/#example-requirements-file
 
 # General Utilities
@@ -10,6 +11,10 @@ python-dotenv
 Flask-RESTful
 python-dateutil
 Flask-JWT-Extended
-# Prevent upgrade to 2.x until Flask-JWT-Extended is updated to support it
+# Flask-JWT-Extended doesn't support PyJWT 2.x as of 3.25.0
+# Prevent upgrade to PyJWT 2.x until Flask-JWT-Extended is updated to support it.
+# Check: https://github.com/vimalloc/flask-jwt-extended/tags
 PyJWT == 1.*
+# Specify pyldap version for custom build. This is not installed by pip.
+pyldap == 3.3.1
 easyad