feat(router): add support for @requires in grpc

demo/pkg/subgraphs/employees/subgraph/employees.go

@@ -41,7 +41,8 @@ var Employees = []*model.Employee{
 			},
 			Surname: "Neuse",
 		},
-		ID: 1,
+		ID:        1,
+		Expertise: "Backend Architecture",
 		Role: model.Engineer{
 			Departments:  []model.Department{model.DepartmentEngineering, model.DepartmentMarketing},
 			EngineerType: model.EngineerTypeBackend,
@@ -81,7 +82,8 @@ var Employees = []*model.Employee{
 			},
 			Surname: "Deus",
 		},
-		ID: 2,
+		ID:        2,
+		Expertise: "Fullstack Development",
 		Role: model.Engineer{
 			Departments:  []model.Department{model.DepartmentEngineering},
 			EngineerType: model.EngineerTypeFullstack,
@@ -121,7 +123,8 @@ var Employees = []*model.Employee{
 			},
 			Surname: "Avram",
 		},
-		ID: 3,
+		ID:        3,
+		Expertise: "Growth Marketing",
 		Role: model.Marketer{
 			Departments: []model.Department{model.DepartmentMarketing},
 			Title:       []string{"Co-founder", "Head of Growth"},
@@ -160,7 +163,8 @@ var Employees = []*model.Employee{
 			},
 			Surname: "Schwenzer",
 		},
-		ID: 4,
+		ID:        4,
+		Expertise: "Operations Management",
 		Role: model.Operator{
 			Departments: []model.Department{model.DepartmentOperations, model.DepartmentMarketing},
 			OperatorType: []model.OperationType{
@@ -203,6 +207,7 @@ var Employees = []*model.Employee{
 			},
 			Surname: "Petrunin",
 		},
+		Expertise: "Backend Systems",
 		Role: model.Engineer{
 			Departments:  []model.Department{model.DepartmentEngineering},
 			EngineerType: model.EngineerTypeBackend,
@@ -242,7 +247,8 @@ var Employees = []*model.Employee{
 			},
 			Surname: "Surya",
 		},
-		ID: 7,
+		ID:        7,
+		Expertise: "Fullstack Development",
 		Role: model.Engineer{
 			Departments:  []model.Department{model.DepartmentEngineering},
 			EngineerType: model.EngineerTypeFullstack,
@@ -282,7 +288,8 @@ var Employees = []*model.Employee{
 			},
 			Surname: "Kumar",
 		},
-		ID: 8,
+		ID:        8,
+		Expertise: "Fullstack Development",
 		Role: model.Engineer{
 			Departments:  []model.Department{model.DepartmentEngineering},
 			EngineerType: model.EngineerTypeFullstack,
@@ -322,7 +329,8 @@ var Employees = []*model.Employee{
 			},
 			Surname: "Wiersma",
 		},
-		ID: 10,
+		ID:        10,
+		Expertise: "Frontend Engineering",
 		Role: model.Engineer{
 			Departments:  []model.Department{model.DepartmentEngineering},
 			EngineerType: model.EngineerTypeFrontend,
@@ -362,7 +370,8 @@ var Employees = []*model.Employee{
 			},
 			Surname: "Neuse",
 		},
-		ID: 11,
+		ID:        11,
+		Expertise: "Finance & Accounting",
 		Role: model.Operator{
 			Departments: []model.Department{model.DepartmentOperations},
 			OperatorType: []model.OperationType{
@@ -404,7 +413,8 @@ var Employees = []*model.Employee{
 			},
 			Surname: "Stutt",
 		},
-		ID: 12,
+		ID:        12,
+		Expertise: "Fullstack Development",
 		Role: model.Engineer{
 			Departments:  []model.Department{model.DepartmentEngineering},
 			EngineerType: model.EngineerTypeFullstack,