WS-31: Submit capability request view

Another merge request, another Pyramid view; this time for submitting capability requests.

I also hooked up the front end to use the new endpoint.

Sorry for the large-ish size. If you have any questions about anything in here, let me know.

shared/workspaces/workspaces/capability/schema.py

@@ -120,22 +120,19 @@ class Capability(Base, CapabilityIF):
         self.requests.append(request)
         return request
 
-    def to_dict(self) -> Dict[str, str]:
-        return {
-            "name": self.name,
-            "max_jobs": self.max_jobs,
-            "steps": str(self.steps),
-            "enabled": self.enabled,
-        }
-
     def __str__(self) -> str:
         return (
             f"Capability: {self.name}, max concurrent jobs of {self.max_jobs}"
             f"\nSequence: {self.steps}"
         )
 
-    def __json__(self) -> str:
-        return json.dumps(self.to_dict())
+    def __json__(self) -> Dict[str, str]:
+        return {
+            "name": self.name,
+            "max_jobs": self.max_jobs,
+            "steps": str(self.steps),
+            "enabled": self.enabled,
+        }
 
 
 class CapabilityRequest(Base, CapabilityRequestIF):
@@ -162,15 +159,13 @@ class CapabilityRequest(Base, CapabilityRequestIF):
     def __str__(self):
         return f"CapabilityRequest object: {self.__dict__}"
 
-    def __json__(self) -> str:
-        return json.dumps(
-            {
-                "id": self.id,
-                "capability_name": self.capability_name,
-                "state": self.state,
-                "parameters": self.parameters,
-            }
-        )
+    def __json__(self) -> Dict[str, str]:
+        return {
+            "id": self.id,
+            "capability_name": self.capability_name,
+            "state": self.state,
+            "parameters": self.parameters,
+        }
 
 
 class CapabilityVersion(Base, CapabilityVersionIF):
@@ -222,7 +217,7 @@ class CapabilityExecution(Base, CapabilityExecutionIF):
         ),
     )
 
-    def __json__(self, request: CapabilityRequest) -> dict:
+    def __json__(self) -> dict:
         return dict(
             id=self.id,
             state=self.state,