fix(ci): retain supervised gate logs and receipts

.github/workflows/nightly-release-green.yml

@@ -247,7 +247,9 @@ jobs:
           path: |
             release-green.json
             release-green.log
+            _artifacts/release-green/
           if-no-files-found: error
+          retention-days: 14
 
       - name: Enforce validation verdict
         if: always()
@@ -388,7 +390,9 @@ jobs:
           path: |
             main-green.json
             main-green.log
+            _artifacts/release-green/
           if-no-files-found: error
+          retention-days: 14
 
       - name: Enforce validation verdict
         if: always()

tests/unit/build/gate-process-artifact.test.ts

@@ -0,0 +1,22 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
+import { parse } from "yaml";
+
+test("both observers retain incremental command logs even on failure", () => {
+  const workflow = parse(
+    readFileSync(
+      new URL("../../../.github/workflows/nightly-release-green.yml", import.meta.url),
+      "utf8"
+    )
+  );
+  for (const id of ["release-green", "main-green"]) {
+    const upload = workflow.jobs[id].steps.find(
+      (step: { name?: string }) => step.name === "Upload report artifact"
+    );
+    assert.equal(upload.if, "always()");
+    assert.match(upload.with.path, /_artifacts\/release-green\//);
+    assert.equal(upload.with["if-no-files-found"], "error");
+    assert.equal(upload.with["retention-days"], 14);
+  }
+});