update API doc

Author: stduhpf

examples/server/server_doc.yaml

@@ -381,17 +381,14 @@ components:
           description: Base64 encoded initial image (for img2img). Empty string clears previous.
         mask_image:
           type: string
-          deprecated: true
-          description: Not implemented yet.
+          description: Base64 encoded grayscale mask image (for img2img/inpainting). Empty string clears previous.
         control_image:
           type: string
-          deprecated: true
-          description: Not implemented yet.
+          description: Base64 encoded control image (for control-nets or other control models). Empty string clears previous.
         ref_images:
           type: array
-          deprecated: true
           items: { type: string }
-          description: Not implemented yet.
+          description: Array of base64 encoded reference images (for edit models).
 
         # --- Structured Parameters ---
         sample_params: