Drop dead description column from documents

The description field on Document and EmployeeDocument was never
populated. Remove it from the database, GraphQL schema, and Go types.

Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>

pkg/coredata/migrations/20260407T120000Z.sql

@@ -14,3 +14,5 @@
 
 -- TODO: drop the title column from documents.
 ALTER TABLE documents ALTER COLUMN title DROP NOT NULL;
+
+ALTER TABLE documents DROP COLUMN description;

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

@@ -2562,7 +2562,6 @@ type Evidence implements Node {
 
 type Document implements Node {
     id: ID!
-    description: String
     currentPublishedMajor: Int
     currentPublishedMinor: Int
     trustCenterVisibility: TrustCenterVisibility!
@@ -2603,7 +2602,6 @@ type EmployeeDocument
     ) {
     id: ID!
     title: String!
-    description: String
     signed: Boolean @goField(forceResolver: true)
     approvalState: DocumentVersionApprovalDecisionState @goField(forceResolver: true)
 

pkg/server/api/console/v1/types/employee_document.go

@@ -44,7 +44,6 @@ type (
 	EmployeeDocument struct {
 		ID           gid.GID
 		Title        string
-		Description  *string
 		DocumentType coredata.DocumentType
 		CreatedAt    time.Time
 		UpdatedAt    time.Time