add schema change to use enum in arch_config (#304)

arch/arch_config_schema.yaml

@@ -88,6 +88,10 @@ properties:
                 type: string
               type:
                 type: string
+              enum:
+                type: array
+                items:
+                  type: string
             additionalProperties: false
             required:
               - name

demos/hr_agent/arch_config.yaml

@@ -30,7 +30,7 @@ system_prompt: |
 
 prompt_targets:
     - name: workforce
-      description: Get workforce data like headcount and satisfacton levels by region and staffing type
+      description: Get workforce data like headcount and satisfaction levels by region and staffing type
       endpoint:
         name: app_server
         path: /agent/workforce
@@ -39,6 +39,7 @@ prompt_targets:
           type: str
           description: specific category or nature of employment used by an organization like fte, contract and agency
           required: true
+          enum: [fte, contract, agency]
         - name: region
           type: str
           required: true