feat(group-filter): 分组账号过滤控制 — require_oauth_only + require_privacy_set

为 OpenAI/Antigravity/Anthropic/Gemini 分组新增两个布尔控制字段：
- require_oauth_only: 创建/更新账号绑定分组时拒绝 apikey 类型加入
- require_privacy_set: 调度选号时跳过 privacy 未成功设置的账号并标记 error

后端：Ent schema 新增字段 + 迁移、Group CRUD 全链路透传、
      gateway_service 与 openai_account_scheduler 两套调度路径过滤
前端：创建/编辑表单 toggle 开关（OpenAI/Antigravity/Anthropic/Gemini 平台可见）

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend/ent/group/where.go

@@ -200,6 +200,16 @@ func AllowMessagesDispatch(v bool) predicate.Group {
 	return predicate.Group(sql.FieldEQ(FieldAllowMessagesDispatch, v))
 }
 
+// RequireOauthOnly applies equality check predicate on the "require_oauth_only" field. It's identical to RequireOauthOnlyEQ.
+func RequireOauthOnly(v bool) predicate.Group {
+	return predicate.Group(sql.FieldEQ(FieldRequireOauthOnly, v))
+}
+
+// RequirePrivacySet applies equality check predicate on the "require_privacy_set" field. It's identical to RequirePrivacySetEQ.
+func RequirePrivacySet(v bool) predicate.Group {
+	return predicate.Group(sql.FieldEQ(FieldRequirePrivacySet, v))
+}
+
 // DefaultMappedModel applies equality check predicate on the "default_mapped_model" field. It's identical to DefaultMappedModelEQ.
 func DefaultMappedModel(v string) predicate.Group {
 	return predicate.Group(sql.FieldEQ(FieldDefaultMappedModel, v))
@@ -1490,6 +1500,26 @@ func AllowMessagesDispatchNEQ(v bool) predicate.Group {
 	return predicate.Group(sql.FieldNEQ(FieldAllowMessagesDispatch, v))
 }
 
+// RequireOauthOnlyEQ applies the EQ predicate on the "require_oauth_only" field.
+func RequireOauthOnlyEQ(v bool) predicate.Group {
+	return predicate.Group(sql.FieldEQ(FieldRequireOauthOnly, v))
+}
+
+// RequireOauthOnlyNEQ applies the NEQ predicate on the "require_oauth_only" field.
+func RequireOauthOnlyNEQ(v bool) predicate.Group {
+	return predicate.Group(sql.FieldNEQ(FieldRequireOauthOnly, v))
+}
+
+// RequirePrivacySetEQ applies the EQ predicate on the "require_privacy_set" field.
+func RequirePrivacySetEQ(v bool) predicate.Group {
+	return predicate.Group(sql.FieldEQ(FieldRequirePrivacySet, v))
+}
+
+// RequirePrivacySetNEQ applies the NEQ predicate on the "require_privacy_set" field.
+func RequirePrivacySetNEQ(v bool) predicate.Group {
+	return predicate.Group(sql.FieldNEQ(FieldRequirePrivacySet, v))
+}
+
 // DefaultMappedModelEQ applies the EQ predicate on the "default_mapped_model" field.
 func DefaultMappedModelEQ(v string) predicate.Group {
 	return predicate.Group(sql.FieldEQ(FieldDefaultMappedModel, v))