gapfill G3: unify all 5 private row_get onto peer_messages.row_get (approvals, automations, marker_tools, todos, wait_ops; resident import retargeted); semantics identical on None/dict/sqlite3.Row, identity tests added

cloud/todos.py

@@ -27,8 +27,9 @@ pending / in_progress / blocked / completed / cancelled，
   一个项目里多人并行，多项 in_progress 是正常态，强制
   单一会把板子变成单人队列，所以这里不做互斥。
 
-本模块只依赖标准库，不 import cloud 其它模块，避免循环
-import；表迁移写法仿 automations（CREATE TABLE IF NOT
+本模块除行取值复用 cloud.peer_messages（该模块本身只依赖
+标准库，故不产生循环 import）外不 import cloud 其它模块；
+表迁移写法仿 automations（CREATE TABLE IF NOT
 EXISTS + 查列补齐，SQLite 与 Postgres 适配层同款：调用方
 仍写 ? 占位符，db.py 适配层转 PG 方言）。
 """
@@ -36,6 +37,8 @@ EXISTS + 查列补齐，SQLite 与 Postgres 适配层同款：调用方
 import time
 import uuid
 
+from cloud.peer_messages import row_get
+
 STATUSES = ("pending", "in_progress", "blocked", "completed", "cancelled")
 PRIORITIES = ("low", "medium", "high")
 MAX_TITLE_LEN = 500
@@ -47,13 +50,6 @@ TODO_COLUMNS = (
     "updated_at", "completed_at")
 
 
-def row_get(row, name):
-    try:
-        return row[name]
-    except (KeyError, IndexError, TypeError):
-        return None
-
-
 def _row_dict(row, columns):
     if row is None or isinstance(row, dict):
         return row