feat(db): moments_post 表+upsert(朋友圈实体,PK=云客data.id,create_time统一ms)

- MomentsPost 模型:moments_post 表,PK=id(云客 getFriendsterInfo data.id),
  wechat_id/create_time 建索引,praise/comment/image 存 JSON 列
- 迁移 524da8d2d597(手写 create_table,已应用到 smoke.db 并在临时 SQLite
  全链路 upgrade/downgrade 验证)
- repos.upsert_moments_posts:批量幂等 upsert;附带修 _build_column_values
  对 JSON 列表的误 join(标量列 join 保持不变,dept_route 旧测试仍过)
- 修复 3 个 chat_group 旧测试缺 owner_account_id(2026-08-24 复合主键遗留)
- 全套 430 测试通过

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

yunke-server/app/db/models.py

@@ -26,7 +26,7 @@ Conventions
     - ``SyncState`` uses ``channel`` to scope a sync cursor (together with
       ``entity_type``).
     - ``Staff``, ``Department``, ``WechatAccount``, ``WhatsappAccount``,
-      ``YkAccount``, ``SyncRun`` carry no ``channel`` column.
+      ``YkAccount``, ``SyncRun``, ``MomentsPost`` carry no ``channel`` column.
 * Primary keys use the natural source id where one exists; otherwise an
   integer surrogate PK is used (``SyncState``, ``YkAccount``, ``SyncRun``).
 * ``GroupMember`` uses a composite PK ``(channel, room_id, member_id)``.
@@ -592,6 +592,33 @@ class Sms(Base):
     __table_args__ = (Index("ix_sms_user_time", "user_id", "create_time"),)
 
 
+class MomentsPost(Base):
+    """员工朋友圈帖子 — source: ``POST /wechatweb/wechatFriendster/getFriendsterInfo``.
+
+    PK = 云客 ``data.id``。``create_time`` 统一 **ms epoch**（云客返回秒，
+    scraper ×1000）。WeChat-only 实体（无 ``channel`` 列），所属员工微信号
+    由 ``wechat_id`` 标识。
+    """
+
+    __tablename__ = "moments_post"
+
+    id: Mapped[str] = mapped_column(String(64), primary_key=True)
+    wechat_id: Mapped[str] = mapped_column(String(128), index=True)
+    sns_id: Mapped[str | None] = mapped_column(String(64), nullable=True)
+    author_name: Mapped[str | None] = mapped_column(String(255), nullable=True)
+    author_wxid: Mapped[str | None] = mapped_column(String(128), nullable=True)
+    author_avatar: Mapped[str | None] = mapped_column(String(1024), nullable=True)
+    content: Mapped[str | None] = mapped_column(Text, nullable=True)
+    type_raw: Mapped[str | None] = mapped_column(String(16), nullable=True)
+    create_time: Mapped[int | None] = mapped_column(BigInteger, index=True)
+    praise_json: Mapped[list[dict[str, Any]] | None] = mapped_column(JSON, nullable=True)
+    comment_json: Mapped[list[dict[str, Any]] | None] = mapped_column(JSON, nullable=True)
+    image_urls: Mapped[list[str] | None] = mapped_column(JSON, nullable=True)
+    raw_json: Mapped[dict[str, Any] | None] = mapped_column(JSON, nullable=True)
+    fetched_at: Mapped[dt.datetime] = _fetched_at()
+    updated_at: Mapped[dt.datetime] = _updated_at()
+
+
 # ===========================================================================
 # 5. Operational / bookkeeping tables (local; no raw_json/version)
 # ===========================================================================
@@ -696,6 +723,7 @@ __all__ = [
     "GroupMember",
     "Media",
     "Message",
+    "MomentsPost",
     "PhoneCall",
     "Sms",
     "Staff",