Implement guard on empty full name before NDA is signed

Signed-off-by: Émile Ré <emile@getprobo.com>

pkg/server/api/trust/v1/schema.graphql

@@ -611,7 +611,6 @@ type DocumentAccess implements Node {
 }
 
 input SendMagicLinkInput {
-  fullName: String!
   email: EmailAddr!
   continue: String
 }
@@ -628,6 +627,14 @@ type VerifyMagicLinkPayload {
   continue: String
 }
 
+input UpdateFullNameInput {
+  fullName: String!
+}
+
+type UpdateFullNamePayload {
+  success: Boolean!
+}
+
 type RequestDocumentAccessPayload {
   document: Document
 }
@@ -827,6 +834,8 @@ type Mutation {
     @session(required: OPTIONAL)
   verifyMagicLink(input: VerifyMagicLinkInput!): VerifyMagicLinkPayload
     @session(required: OPTIONAL)
+  updateFullName(input: UpdateFullNameInput!): UpdateFullNamePayload
+    @session(required: PRESENT)
 
   requestAllAccesses: RequestAccessesPayload! @session(required: PRESENT) @nda