feat(models): add Chinese verbose_name to all 74 models (Phase 4.0)

为所有 Django 模型添加 Meta.verbose_name 和 verbose_name_plural（中文表名），
覆盖 10 个 app 的全部 74 个业务模型。

Phase 4.0 范围：
- 仅 Meta 类级别中文名（用于 Django Admin、drf-spectacular OpenAPI title、错误信息）
- 字段级 verbose_name= 和 help_text= 留待 Phase 4.1（待 PM 补全 DATA_MODEL 后同步）

变更：
- 20 个 models 文件改动（每个模型 +2 行）
- 8 个 0002/0003 迁移文件（Meta options 变更）
- apps/tenant/migrations/0001_initial.py（之前漏生成的 tenant 模型迁移）

manage.py check: 0 issues。

apps/property/models/listings.py

@@ -44,6 +44,8 @@ class ListingHistory(UUIDPrimaryKeyModel):
 
     class Meta:
         db_table = "listing_histories"
+        verbose_name = "挂牌历史"
+        verbose_name_plural = "挂牌历史"
         indexes = [
             models.Index(fields=["property"], name="idx_lh_property"),
             models.Index(fields=["property", "status"], name="idx_lh_active"),
@@ -69,6 +71,8 @@ class PriceChange(UUIDPrimaryKeyModel):
 
     class Meta:
         db_table = "price_changes"
+        verbose_name = "调价记录"
+        verbose_name_plural = "调价记录"
         indexes = [
             models.Index(fields=["property"], name="idx_pchg_property"),
             models.Index(fields=["property", "-changed_at"], name="idx_pchg_time"),
@@ -130,6 +134,8 @@ class Commission(TimeStampedModel):
 
     class Meta:
         db_table = "commissions"
+        verbose_name = "委托管理"
+        verbose_name_plural = "委托管理"
         indexes = [
             models.Index(fields=["property"], name="idx_commissions_property"),
             models.Index(fields=["property", "status"], name="idx_commissions_active"),
@@ -151,6 +157,8 @@ class CommissionAttachment(UUIDPrimaryKeyModel):
 
     class Meta:
         db_table = "commission_attachments"
+        verbose_name = "委托附件"
+        verbose_name_plural = "委托附件"
         indexes = [models.Index(fields=["commission"], name="idx_ca_commission")]
 
 
@@ -188,6 +196,8 @@ class NumberHolderApproval(UUIDPrimaryKeyModel):
 
     class Meta:
         db_table = "number_holder_approvals"
+        verbose_name = "号码方审批"
+        verbose_name_plural = "号码方审批"
         indexes = [
             models.Index(fields=["status"], name="idx_nha_status"),
             models.Index(fields=["property"], name="idx_nha_property"),