chore: import upstream snapshot with attribution

tests/unit/validation-cloud-providers-split.test.ts

@@ -0,0 +1,38 @@
+// Characterization of the validation.ts enterprise-cloud split (god-file decomposition): the 10 cloud
+// validators (heroku/databricks/datarobot/snowflake/gigachat/azure-openai/azure-ai/watsonx/oci/sap)
+// moved into validation/cloudProviders.ts, and the shared "POST /chat/completions auth probe"
+// (validateDirectChatProvider) moved into validation/directChatProbe.ts so the host and the cloud
+// module share it without a cycle. Behavior-preserving move — the locks here are module surface +
+// the no-cycle wiring. Runtime behavior stays covered by provider-validation-azure-vertex/branches.
+import { test } from "node:test";
+import assert from "node:assert/strict";
+
+const cloud = await import("../../src/lib/providers/validation/cloudProviders.ts");
+const probe = await import("../../src/lib/providers/validation/directChatProbe.ts");
+const HOST = await import("../../src/lib/providers/validation.ts");
+
+test("cloudProviders exposes the ten enterprise-cloud validators", () => {
+  for (const name of [
+    "validateHerokuProvider",
+    "validateDatabricksProvider",
+    "validateDataRobotProvider",
+    "validateSnowflakeProvider",
+    "validateGigachatProvider",
+    "validateAzureOpenAIProvider",
+    "validateAzureAiProvider",
+    "validateWatsonxProvider",
+    "validateOciProvider",
+    "validateSapProvider",
+  ]) {
+    assert.equal(typeof (cloud as Record<string, unknown>)[name], "function", `missing ${name}`);
+  }
+});
+
+test("directChatProbe exposes the shared validateDirectChatProvider helper", () => {
+  assert.equal(typeof probe.validateDirectChatProvider, "function");
+});
+
+test("host dispatcher surface stays intact after the move", () => {
+  assert.equal(typeof (HOST as Record<string, unknown>).validateProviderApiKey, "function");
+  assert.equal(typeof (HOST as Record<string, unknown>).validateCommandCodeProvider, "function");
+});