feat: expand admin customer account controls

backend/app/schemas/admin.py

@@ -66,14 +66,40 @@ class AdminAccountMember(BaseModel):
     deleted_at: Optional[datetime] = None
 
 
+class AdminAccountOwnerSummary(BaseModel):
+    id: UUID
+    name: str
+    email: EmailStr
+
+
+class AdminAccountSubscriptionSummary(BaseModel):
+    id: UUID
+    plan: str
+    status: str
+    billing_interval: Optional[str] = None
+    current_period_end: Optional[datetime] = None
+    cancel_at_period_end: bool = False
+
+
+class AdminAccountUsageSummary(BaseModel):
+    tree_count: int = 0
+    session_count_this_month: int = 0
+
+
 class AdminAccountListItem(BaseModel):
     id: UUID
     name: str
     display_code: str
     created_at: datetime
     owner_id: Optional[UUID] = None
+    owner: Optional[AdminAccountOwnerSummary] = None
+    subscription: Optional[AdminAccountSubscriptionSummary] = None
+    usage: AdminAccountUsageSummary = Field(default_factory=AdminAccountUsageSummary)
     member_count: int = 0
     active_member_count: int = 0
+    pending_invite_count: int = 0
+    sso_enabled: bool = False
+    branding_company_name: Optional[str] = None
     members: list[AdminAccountMember] = Field(default_factory=list)