refactor(review): sibling-consistent naming + module import; assert mark-reviewed git round-trip

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/app/bot.py

@@ -27,7 +27,7 @@ import json
 import logging
 from dataclasses import dataclass
 
-from . import db, notify
+from . import db, entry as entry_mod, notify
 from .gitea import Gitea, GiteaError
 
 log = logging.getLogger(__name__)
@@ -1085,8 +1085,6 @@ class Bot:
         frontmatter on main. Stamps the commit with the §6.5 On-behalf-of
         trailer and writes an actions-log row, mirroring the graduation
         stamp's bot-write shape."""
-        from . import entry as entry_mod
-
         path = f"rfcs/{slug}.md"
         result = await self._gitea.read_file(org, meta_repo, path, ref="main")
         if result is None:
@@ -1097,7 +1095,7 @@ class Bot:
         e.reviewed_at = reviewed_at
         e.reviewed_by = reviewed_by
         commit_message = _stamp_single(f"Mark {slug} reviewed", actor)
-        result2 = await self._gitea.update_file(
+        result = await self._gitea.update_file(
             org, meta_repo, path,
             content=entry_mod.serialize(e),
             sha=sha,
@@ -1107,8 +1105,8 @@ class Bot:
             author_email=actor.email or f"{actor.gitea_login}@users.noreply",
         )
         commit_sha = (
-            result2.get("commit", {}).get("sha")
-            or result2.get("content", {}).get("sha")
+            result.get("commit", {}).get("sha")
+            or result.get("content", {}).get("sha")
             or ""
         )
         _log(