chore: sanity lesson fields read only in Studio

package.json

@@ -14,6 +14,7 @@
     "dev:inngest": "pnpx inngest-cli@latest dev --no-discovery -u http://egghead.af:3000/api/inngest",
     "dev-build": "NODE_ENV=production next build",
     "sanity": "cd studio && sanity dev",
+    "sanity:deploy": "cd studio && sanity deploy",
     "prebuild": "pnpm make-tags-sitemap",
     "build": "pnpm dev-build",
     "postbuild": "NODE_ENV=production next-sitemap",

studio/schemas/documents/lesson.ts

@@ -13,6 +13,7 @@ export default defineType({
       type: 'string',
       title: 'Title',
       description: 'Titles should be catchy, descriptive, and not too long',
+      readOnly: true,
       validation: (Rule) =>
         Rule.custom((field, context) =>
           context?.document?.status &&
@@ -26,6 +27,7 @@ export default defineType({
       name: 'slug',
       type: 'slug',
       title: 'Slug',
+      readOnly: true,
       validation: (Rule) => Rule.required(),
       description:
         'Some frontends will require a slug to be set to be able to show the post',
@@ -37,6 +39,7 @@ export default defineType({
     defineField({
       title: 'Rails Lesson ID',
       description: 'Rails lesson id',
+      readOnly: true,
       name: 'railsLessonId',
       type: 'number',
     }),
@@ -100,6 +103,7 @@ export default defineType({
       title: 'Status',
       name: 'status',
       type: 'string',
+      readOnly: true,
       options: {
         list: [
           {title: 'Needs Review', value: 'needs-review'},
@@ -113,6 +117,7 @@ export default defineType({
       title: 'Access Level',
       name: 'accessLevel',
       type: 'string',
+      readOnly: true,
       options: {
         list: [
           {title: 'Free', value: 'free'},