fix: update photo schema to make alt optional and require aspectRatio and createdAt

__generated__/lexicons.ts

···
     defs: {
       photoView: {
         type: 'object',
-        required: ['uri', 'cid', 'thumb', 'fullsize', 'alt'],
+        required: ['uri', 'cid', 'thumb', 'fullsize', 'aspectRatio'],
         properties: {
           uri: {
             type: 'string',
···
         key: 'tid',
         record: {
           type: 'object',
-          required: ['photo', 'alt'],
+          required: ['photo', 'aspectRatio', 'createdAt'],
           properties: {
             photo: {
               type: 'blob',

__generated__/types/social/grain/photo.ts

···
   $type: 'social.grain.photo'
   photo: BlobRef
   /** Alt text description of the image, for accessibility. */
-  alt: string
-  aspectRatio?: SocialGrainDefs.AspectRatio
-  createdAt?: string
+  alt?: string
+  aspectRatio: SocialGrainDefs.AspectRatio
+  createdAt: string
   [k: string]: unknown
 }
 

__generated__/types/social/grain/photo/defs.ts

···
   /** Fully-qualified URL where a large version of the image can be fetched. May or may not be the exact original blob. For example, CDN location provided by the App View. */
   fullsize: string
   /** Alt text description of the image, for accessibility. */
-  alt: string
-  aspectRatio?: SocialGrainDefs.AspectRatio
+  alt?: string
+  aspectRatio: SocialGrainDefs.AspectRatio
   exif?: ExifView
   gallery?: GalleryState
 }

lexicons/social/grain/photo/defs.json

···
   "defs": {
     "photoView": {
       "type": "object",
-      "required": ["uri", "cid", "thumb", "fullsize", "alt"],
+      "required": ["uri", "cid", "thumb", "fullsize", "aspectRatio"],
       "properties": {
         "uri": { "type": "string", "format": "at-uri" },
         "cid": { "type": "string", "format": "cid" },

lexicons/social/grain/photo/photo.json

···
       "key": "tid",
       "record": {
         "type": "object",
-        "required": ["photo", "alt"],
+        "required": ["photo", "aspectRatio", "createdAt"],
         "properties": {
           "photo": {
             "type": "blob",

src/api/mod.ts

···
       const photoUri = await createPhoto(
         {
           photo: blobRef,
-          alt: "", // @TODO: make this optional
           aspectRatio: {
             width,
             height,

src/lib/photo.ts

···
     "social.grain.photo",
     {
       photo: data.photo,
-      alt: data.alt || "",
+      alt: data.alt,
       aspectRatio: data.aspectRatio || undefined,
       createdAt: new Date().toISOString(),
     },

src/routes/actions.tsx

···
           height,
         }
         : undefined,
-      alt: "",
       createdAt: new Date().toISOString(),
     }, ctx);