DOC: add docstrings

src/linkahead/common/models.py

@@ -506,6 +506,7 @@ class Entity:
         return self
 
     def get_versionid(self):
+        """Returns the concatenation of ID and version"""
         return str(self.id)+"@"+str(self.version.id)
 
     def get_importance(self, property):  # @ReservedAssignment
@@ -2131,9 +2132,11 @@ class Property(Entity):
 
 
     def value_matches_versionid(self):
+        """Returns True if the value matches the pattern <id>@<version>"""
         return value_matches_versionid(self.value)
 
     def get_id_from_versionid_value(self):
+        """Returns the ID part of the versionid with the pattern <id>@<version>"""
         return get_id_from_versionid(self.value)
 
 class Message(object):
@@ -5682,6 +5685,7 @@ def _filter_entity_list_by_identity(listobject: list[Entity],
     return matches
 
 def value_matches_versionid(value: Union[int, str]):
+    """Returns True if the value matches the pattern <id>@<version>"""
     if isinstance(value, int):
         return False
     if not isinstance(value, str):
@@ -5690,4 +5694,5 @@ def value_matches_versionid(value: Union[int, str]):
     return "@" in value
 
 def get_id_from_versionid(versionid: str):
+    """Returns the ID part of the versionid with the pattern <id>@<version>"""
     return versionid.split("@")[0]