Document image_server in project exports

content/project/export/index.md

@@ -110,6 +110,17 @@ id | `VARCHAR(37)` | UUID of the image.
 url | `TEXT` | URL leading to the image's IIIF identifier.
 width | `INTEGER` | Width of the image in pixels. Can be 0 if it is unknown.
 height | `INTEGER` | Height of the image in pixels. Can be 0 if it is unknown.
+server_id | `VARCHAR(37)` | Integer ID of the server that hosts this image.
+
+### image_server
+
+Name | Type | Description
+---- | ---- | -----------
+id | `VARCHAR(37)` | Integer ID of the IIIF image server.
+display_name | `VARCHAR(250)` | Human-readable name of the server.
+url | `TEXT` | Base URL for all images in this server.
+max_width | `INTEGER` | Maximum width of any image that the server will return. Nullable.
+max_height | `INTEGER` | Maximum height of any image that the server will return. Nullable.
 
 ### metadata
 

content/project/export/structure.txt

@@ -25,3 +25,4 @@ graph LR
     metadata --> worker_version
     metadata --> worker_run
     worker_run --> worker_version
+    image --> image_server