`editEphemeralMessageText` throws wrong error `MEDIA_CAPTION_TOO_LONG` instead of `MESSAGE_TOO_LONG` and limit mismatch (1024 vs 4096)

[beepsound]

I found two issues with editEphemeralMessageText.

1. Wrong character limit:
According to the docs, the text limit is 4096 characters, but the method throws an error when text is > 1024 characters.

2. Wrong error type:
When the limit is exceeded, it throws MEDIA_CAPTION_TOO_LONG, which is incorrect for a text message. The expected error should be MESSAGE_TOO_LONG.

The error MEDIA_CAPTION_TOO_LONG should only apply to media captions (which have a 1024 limit), not to editEphemeralMessageText.

Steps to Reproduce:
curl -X POST "https://api.telegram.org/bot<TOKEN>/editEphemeralMessageText"
-H "Content-Type: application/json"
-d '{
"chat_id": -100xx,
"receiver_user_id": 123xxx,
"ephemeral_message_id": 123xxx,
"text": "'$(printf '0%.0s' {1..1025})'"
}'
Expected:

• Should accept up to 4096 characters
• If > 4096, should return MESSAGE_TOO_LONG

Actual:

• Fails at > 1024 characters
• Returns MEDIA_CAPTION_TOO_LONG

Looks like the backend is validating this as a caption, not as a message text.

Thanks!