CCM-11580: add limit parameter to list letters endpoint

Author: m-houston

specification/api/components/endpoints/listLetters.yml

@@ -3,9 +3,10 @@ operationId: listLetters
 tags:
   - letter
 # We have disabled pagination and will only return PENDING letters via this endpoint for now
-#parameters:
+parameters:
 #  - $ref: "../parameters/letterStatus.yml"
 #  - $ref: "../parameters/pageNumber.yml"
+  - $ref: "../parameters/limit.yml"
 description: The key use of this endpoint is to query letters which are ready to be printed
 responses:
   '200':

specification/api/components/parameters/limit.yml

@@ -0,0 +1,7 @@
+name: limit
+in: query
+description: |-
+  The maximum number of items to return in a single request
+schema:
+  type: number
+  example: 100