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/follow_keys.py

@@ -44,6 +44,8 @@ class FollowLog(models.Model):
 
     class Meta:
         db_table = "follow_logs"
+        verbose_name = "房源跟进日志"
+        verbose_name_plural = "房源跟进日志"
         managed = False
         unique_together = (("id", "created_at"),)
 
@@ -61,6 +63,8 @@ class FollowLogAttachment(UUIDPrimaryKeyModel):
 
     class Meta:
         db_table = "follow_log_attachments"
+        verbose_name = "跟进附件"
+        verbose_name_plural = "跟进附件"
         indexes = [models.Index(fields=["follow_log_id"], name="idx_fla_log")]
 
 
@@ -72,6 +76,8 @@ class FollowLogRecording(UUIDPrimaryKeyModel):
 
     class Meta:
         db_table = "follow_log_recordings"
+        verbose_name = "跟进录音"
+        verbose_name_plural = "跟进录音"
         indexes = [models.Index(fields=["follow_log_id"], name="idx_flr_log")]
 
 
@@ -114,6 +120,8 @@ class PropertyKey(UUIDPrimaryKeyModel):
 
     class Meta:
         db_table = "property_keys"
+        verbose_name = "房源钥匙"
+        verbose_name_plural = "房源钥匙"
         indexes = [models.Index(fields=["property"], name="idx_pk_property")]
 
 
@@ -127,4 +135,6 @@ class KeyAttachment(UUIDPrimaryKeyModel):
 
     class Meta:
         db_table = "key_attachments"
+        verbose_name = "钥匙附件"
+        verbose_name_plural = "钥匙附件"
         indexes = [models.Index(fields=["key"], name="idx_ka_key")]