Fix Codegen Imports

Fix codegen imports

butcher apply sometimes emits modules that reference a name it never imported (usually a new enum, or Enum itself). Ruff catches all of them as F821.

Steps

1. List the offenders:

   rtk ruff check --preview --output-format=concise aiogram examples
   

   Only F821 Undefined name findings are in scope. Anything else is a real bug — report it, don't patch it.

2. For each undefined name, copy the import from a sibling module that already uses the same kind of symbol — do not invent a new style:

   Undefined name	Fix	Reference file
   Enum in aiogram/enums/*.py	from enum import Enum as the first line	aiogram/enums/chat_action.py
   An enum in aiogram/types/*.py or aiogram/methods/*.py	from ..enums import <Name>, placed above the from . imports	aiogram/types/input_paid_media_photo.py
   A type in aiogram/types/*.py	from .<snake_case_module> import <Name>	any sibling type

   If the module has annotations referencing types only imported under TYPE_CHECKING, it also needs from __future__ import annotations as the first line — generated modules that quote forward refs all have it.

3. Verify:

   rtk ruff format aiogram
   rtk ruff check --preview aiogram examples
   rtk mypy aiogram
   

Follow-up

These files are generated. A hand-fix survives only until the next butcher apply all. After the branch is green, tell the user the durable fix belongs in .butcher (template / entity config for the symbol whose import was dropped) so regeneration stops losing it.