allow multi-track drifting (multiple images to retcon)

vibe_bot/main.py

@@ -278,14 +278,17 @@ async def doodlebob(ctx, *, message: str):
 
 @bot.command(name="retcon")
 async def retcon(ctx, *, message: str):
-    image_url = ctx.message.attachments[0].url
-    image_data = requests.get(image_url).content
-    image_bytestream = BytesIO(image_data)
+    image_data_list = []
+    for discord_image in ctx.message.attachments:
+        image_url = discord_image.url
+        image_data = requests.get(image_url).content
+        image_bytestream = BytesIO(image_data)
+        image_data_list.append(image_bytestream)
 
     await ctx.send(f"**Rewriting history to match {message[:100]}...**")
 
     image_b64 = llama_wrapper.image_edit(
-        image=image_bytestream,
+        image=image_data_list,
         prompt=message,
         openai_url=IMAGE_EDIT_ENDPOINT,
         openai_api_key=IMAGE_EDIT_ENDPOINT_KEY,