feat(api version): add an api_version key to DTOs

Data Transfer Objects (DTOs) are any object that we expect to be used to be used by an external API
(ie: not-queenbee) to be parsed and computed. I have opted for a version and maturity flag for API
versions (ie: version = v1 and maturity = beta1). This versioning schema should ideally work like
described for the Kubernetes project:
https://kubernetes.io/docs/concepts/overview/kubernetes-api/#api-groups-and-versioning

queenbee/job/job.py

@@ -10,6 +10,8 @@ class Job(BaseModel):
 
     A Job is an object to submit a list of arguments to execute a Queenbee recipe.
     """
+    api_version: constr(regex='^Job$') = 'Job'
+
     type: constr(regex='^Job$') = 'Job'
 
     source: str = Field(

queenbee/job/status.py

@@ -118,6 +118,8 @@ class StepStatus(BaseStatus):
 
 class JobStatus(BaseStatus):
     """Job Status."""
+    api_version: constr(regex='^v1beta1$') = 'v1beta1'
+
     type: constr(regex='^JobStatus$') = 'JobStatus'
 
     id: str = Field(

queenbee/plugin/plugin.py

@@ -64,6 +64,8 @@ class Plugin(BaseModel):
     A plugin contains runtime configuration for a Command Line Interface (CLI) and
     a list of functions that can be executed using this CLI tool.
     """
+    api_version: constr(regex='^v1beta1$') = 'v1beta1'
+
     type: constr(regex='^Plugin') = 'Plugin'
 
     metadata: MetaData = Field(

queenbee/recipe/recipe.py

@@ -56,6 +56,8 @@ def from_plugin(cls, plugin: Plugin) -> list:
 
 class Recipe(BaseModel):
     """A Queenbee Recipe"""
+    api_version: constr(regex='^v1beta1$') = 'v1beta1'
+
     type: constr(regex='^Recipe$') = 'Recipe'
 
     metadata: MetaData = Field(
@@ -688,6 +690,8 @@ class RecipeInterface(BaseModel):
     Recipe information only includes metadata, source, inputs and outputs of a Recipe.
     This object is useful for creating user interface for Recipes.
     """
+    api_version: constr(regex='^v1beta1$') = 'v1beta1'
+
     type: constr(regex='^RecipeInterface$') = 'RecipeInterface'
 
     metadata: MetaData = Field(

queenbee/repository/index.py

@@ -43,6 +43,7 @@ class RepositoryMetadata(BaseModel):
 
 class RepositoryIndex(BaseModel):
     """A searchable index for a Queenbee Plugin and Recipe repository"""
+    api_version: constr(regex='^v1beta1$') = 'v1beta1'
 
     type: constr(regex='^RepositoryIndex$') = 'RepositoryIndex'