Use stricter epic ID type definition

.rubocop_todo.yml

@@ -1269,11 +1269,10 @@ RSpec/TimecopTravel:
     - 'spec/workers/concerns/reenqueuer_spec.rb'
     - 'spec/lib/gitlab/analytics/cycle_analytics/median_spec.rb'
 
-# Offense count: 43
+# Offense count: 21
 Graphql/IDType:
   Exclude:
     - 'ee/app/graphql/ee/mutations/issues/update.rb'
-    - 'ee/app/graphql/ee/types/boards/board_issue_input_base_type.rb'
     - 'ee/app/graphql/mutations/iterations/update.rb'
     - 'ee/app/graphql/resolvers/iterations_resolver.rb'
     - 'app/graphql/mutations/boards/issues/issue_move_list.rb'

doc/api/graphql/reference/gitlab_schema.graphql

@@ -1695,7 +1695,7 @@ input BoardIssueInput {
   """
   Filter by epic ID. Incompatible with epicWildcardId
   """
-  epicId: ID
+  epicId: EpicID
 
   """
   Filter by epic ID wildcard. Incompatible with epicId
@@ -12558,7 +12558,7 @@ input NegatedBoardIssueInput {
   """
   Filter by epic ID. Incompatible with epicWildcardId
   """
-  epicId: ID
+  epicId: EpicID
 
   """
   Filter by label name

doc/api/graphql/reference/gitlab_schema.json

@@ -4518,7 +4518,7 @@
               "description": "Filter by epic ID. Incompatible with epicWildcardId",
               "type": {
                 "kind": "SCALAR",
-                "name": "ID",
+                "name": "EpicID",
                 "ofType": null
               },
               "defaultValue": null
@@ -36905,7 +36905,7 @@
               "description": "Filter by epic ID. Incompatible with epicWildcardId",
               "type": {
                 "kind": "SCALAR",
-                "name": "ID",
+                "name": "EpicID",
                 "ofType": null
               },
               "defaultValue": null

ee/app/graphql/ee/types/boards/board_issue_input_base_type.rb

@@ -7,7 +7,7 @@ module EE
         extend ActiveSupport::Concern
 
         prepended do
-          argument :epic_id, GraphQL::ID_TYPE,
+          argument :epic_id, ::Types::GlobalIDType[::Epic],
                    required: false,
                    description: 'Filter by epic ID. Incompatible with epicWildcardId'
 

ee/changelogs/unreleased/fix_epic_id_type.yml

+---
+title: Update epic ID type in board issue mutations to be more specific
+merge_request: 45460
+author:
+type: changed