Vote/VoteInterface are documented improperly and incompletely

VoteInterface exists to define the required public methods of vote entities.

VoteInterface should be the place where these methods are defined and documented, because that is the purpose of the interface - to provide a public "contract" for the methods - their call parameters, their return types, and a description of what they are intended to do.

The whole notion of abstracting things to an interface is so alternative implementations may be provided and so those implementations will work as long as they are defined and perform according to the interface definition.

However, VoteInterface and Vote are coded improperly. Specifically:

1. Most of the VoteInterface methods are documented with {@inheritdoc} This is wrong because VoteInterface does not inherit these methods from any other interface, so there is no documentation to "inherit". Likewise, VoteInterface is supposed to be DEFINING these methods, meaning this is the ONLY place they can be documented. Additionally, some of the documentation that is in VoteInterface is wrong - for example all the setters return $this but that is not documented, and there are some needed corrections. All of these {@inheritdoc} comments need to be replaced with real and accurate method documentation.
2. VoteInterface extends EntityOwnerInterface, but it also REDEFINES all four of the the methods declared on EntityOwnerInterface. This is wrong. EntityOwnerInterface defines these methods and documents these methods, VoteInterface should NOT be redefining them - that defeats the whole purpose of extending EntityOwnerInterface and destroys the documentation provided by EntityOwnerInterface. These redeclarations need to be removed from VoteInterface.
3. Vote::setCreatedTime() and Vote::getCreatedTime() are an essential part of the Vote entity definition, but they are not part of VoteInterface. That is wrong. If these methods are not defined on VoteInterface that means we have no way of providing alternative implementations of Vote because there is no way to enforce the required functionality of these implementations. The definition of get/setCreatedTime() needs to be added to VoteInterface.
4. The Vote entity has documentation for the methods postSave() and postDelete() which are defined by the ContentEntityBase. This is wrong. We should be using {@inheritdoc} HERE in the Vote entity since the Vote entity DOES inherit this documentation from the ContentEntityBase.

I'm marking this as "Major" because there are some fundamental problems with the Vote entity implementation that I would like to clean up, but that can't be done until we first sort out this division of responsibility between the interface and the implementation.