fix: preserve artifact writer failures

tests/unit/release-artifacts.test.ts

@@ -165,6 +165,14 @@ describe("release artifact contracts", () => {
         dependencyCount: 2,
       }),
     ).toThrow();
+    expect(() =>
+      dependencyInventoryArtifactSchema.parse({
+        ...inventory,
+        dependencyCount: 0,
+        directDependencyCount: 0,
+        dependencies: [],
+      }),
+    ).toThrow();
   });
 
   it("rejects undeclared supply-chain verification evidence", () => {
@@ -215,6 +223,35 @@ describe("release artifact contracts", () => {
     );
   });
 
+  it("requires the complete repository registry set for success evidence", () => {
+    const successfulEvidence = {
+      schemaVersion: 2,
+      generatedAt: "2026-08-01T00:00:00.000Z",
+      baselineDigest: null,
+      currentDigest: "a".repeat(64),
+      compatibility: { impact: "not-evaluated", changes: [] },
+      failures: [],
+      registries: Array.from({ length: 11 }, (_, index) => ({
+        registryId: `registry-${index}`,
+        owner: "platform",
+        source: `src/registry-${index}.ts`,
+        rowCount: 0,
+        contract: {},
+        rows: {},
+      })),
+    } as const;
+
+    expect(registrySnapshotArtifactSchema.parse(successfulEvidence)).toEqual(
+      successfulEvidence,
+    );
+    expect(() =>
+      registrySnapshotArtifactSchema.parse({
+        ...successfulEvidence,
+        registries: [],
+      }),
+    ).toThrow();
+  });
+
   it("preserves unverified field evidence when no samples are eligible", () => {
     const report = {
       schemaVersion: 1,