feat(platform): close AI expense value loop

Add tenant-safe value, telemetry, connector, commercial, and production-readiness foundations.

server/tests/test_hierarchical_expense_memory_foundation.py

@@ -13,6 +13,7 @@ from app.api.deps import _authenticate_bearer_user
 from app.db.base import Base
 from app.models.ai_memory import MemoryEntry
 from app.models.employee import Employee
+from app.models.tenant import Tenant
 from app.services.auth import AuthService
 from app.services.auth_sessions import AuthSessionService
 from app.services.employee import EmployeeService
@@ -149,11 +150,22 @@ def test_admin_managed_memory_rejects_partially_missing_audit_fields() -> None:
 
 def test_authenticated_session_restores_tenant_and_stable_department_id() -> None:
     with _build_session() as db:
-        employee_snapshot = EmployeeService(db).list_employees()[0]
+        db.add(
+            Tenant(
+                tenant_id="tenant-session-a",
+                tenant_code="tenant-session-a",
+                name="会话租户 A",
+                status="active",
+            )
+        )
+        db.flush()
+        employee_snapshot = EmployeeService(
+            db,
+            tenant_id="tenant-session-a",
+        ).list_employees()[0]
         employee = db.get(Employee, employee_snapshot.id)
         assert employee is not None
         authenticated_at_login = AuthService(db)._build_employee_user(employee)
-        authenticated_at_login.tenant_id = "tenant-session-a"
         access_token, auth_session = AuthSessionService(db).issue(
             authenticated_at_login,
             metric_session_id="metric-session-a",