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/complex/models/complex.py

@@ -133,6 +133,8 @@ class Complex(SoftDeleteModel):
 
     class Meta:
         db_table = "complexes"
+        verbose_name = "楼盘"
+        verbose_name_plural = "楼盘"
         indexes = [
             models.Index(
                 fields=["district"],
@@ -176,6 +178,8 @@ class ComplexAlias(UUIDPrimaryKeyModel):
 
     class Meta:
         db_table = "complex_aliases"
+        verbose_name = "楼盘别名"
+        verbose_name_plural = "楼盘别名"
         indexes = [
             models.Index(fields=["complex"], name="idx_complex_aliases_complex"),
         ]
@@ -200,6 +204,8 @@ class ComplexBusinessArea(models.Model):
 
     class Meta:
         db_table = "complex_business_areas"
+        verbose_name = "楼盘商圈关联"
+        verbose_name_plural = "楼盘商圈关联"
         constraints = [
             models.UniqueConstraint(
                 fields=["complex", "business_area"],
@@ -233,6 +239,8 @@ class ComplexSchool(models.Model):
 
     class Meta:
         db_table = "complex_schools"
+        verbose_name = "楼盘学校关联"
+        verbose_name_plural = "楼盘学校关联"
         constraints = [
             models.UniqueConstraint(
                 fields=["complex", "school"],
@@ -259,6 +267,8 @@ class ComplexMetroStation(models.Model):
 
     class Meta:
         db_table = "complex_metro_stations"
+        verbose_name = "楼盘地铁站关联"
+        verbose_name_plural = "楼盘地铁站关联"
         constraints = [
             models.UniqueConstraint(
                 fields=["complex", "station"],
@@ -307,6 +317,8 @@ class Building(TimeStampedModel):
 
     class Meta:
         db_table = "buildings"
+        verbose_name = "楼栋"
+        verbose_name_plural = "楼栋"
         indexes = [
             models.Index(
                 fields=["complex"],
@@ -342,6 +354,8 @@ class RoomUnit(TimeStampedModel):
 
     class Meta:
         db_table = "room_units"
+        verbose_name = "房号单元"
+        verbose_name_plural = "房号单元"
         indexes = [
             models.Index(
                 fields=["building"],
@@ -388,6 +402,8 @@ class ComplexPhoto(UUIDPrimaryKeyModel):
 
     class Meta:
         db_table = "complex_photos"
+        verbose_name = "楼盘照片"
+        verbose_name_plural = "楼盘照片"
         indexes = [
             models.Index(fields=["complex"], name="idx_complex_photos_complex"),
             models.Index(fields=["complex", "category"], name="idx_complex_photos_category"),
@@ -424,6 +440,8 @@ class ComplexAttachment(UUIDPrimaryKeyModel):
 
     class Meta:
         db_table = "complex_attachments"
+        verbose_name = "楼盘附件"
+        verbose_name_plural = "楼盘附件"
         ordering = ["complex_id", "sort_order"]
 
 
@@ -442,6 +460,8 @@ class ComplexPriceTrend(UUIDPrimaryKeyModel):
 
     class Meta:
         db_table = "complex_price_trends"
+        verbose_name = "楼盘价格走势"
+        verbose_name_plural = "楼盘价格走势"
         constraints = [
             models.UniqueConstraint(
                 fields=["complex", "record_month"],