feat(platform): close AI expense value loop

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

server/tests/test_knowledge_security_migration.py

@@ -0,0 +1,26 @@
+from __future__ import annotations
+
+import importlib.util
+from pathlib import Path
+
+MIGRATION_PATH = (
+    Path(__file__).resolve().parents[1]
+    / "alembic"
+    / "versions"
+    / "20260717_0027_knowledge_tenant_security.py"
+)
+
+
+def test_knowledge_security_migration_has_fixed_ancestry_and_fail_closed_downgrade() -> None:
+    spec = importlib.util.spec_from_file_location("knowledge_security_0027", MIGRATION_PATH)
+    assert spec is not None and spec.loader is not None
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+
+    assert module.revision == "20260717_0027"
+    assert module.down_revision == "20260717_0026"
+    source = MIGRATION_PATH.read_text(encoding="utf-8")
+    assert "knowledge_onlyoffice_sessions" in source
+    assert "fk_knowledge_onlyoffice_sessions_tenant" in source
+    assert "ck_knowledge_onlyoffice_sessions_scope_tenant" in source
+    assert "OnlyOffice session evidence exists" in source