fix(cli-run): avoid infinite wait on missing child status

Treat child sessions missing from session.status as transient so completion polling can proceed while still blocking on explicit non-idle descendants.

src/cli/run/completion.test.ts

@@ -143,7 +143,7 @@ describe("checkCompletionConditions", () => {
     expect(result).toBe(false)
   })
 
-  it("returns false when child status is missing", async () => {
+  it("returns true when child status is missing but descendants are idle", async () => {
     // given
     spyOn(console, "log").mockImplementation(() => {})
     const ctx = createMockContext({
@@ -158,6 +158,28 @@ describe("checkCompletionConditions", () => {
     // when
     const result = await checkCompletionConditions(ctx)
 
+    // then
+    expect(result).toBe(true)
+  })
+
+  it("returns false when descendant is busy even if parent status is missing", async () => {
+    // given
+    spyOn(console, "log").mockImplementation(() => {})
+    const ctx = createMockContext({
+      childrenBySession: {
+        "test-session": [{ id: "child-1" }],
+        "child-1": [{ id: "grandchild-1" }],
+        "grandchild-1": [],
+      },
+      statuses: {
+        "grandchild-1": { type: "busy" },
+      },
+    })
+    const { checkCompletionConditions } = await import("./completion")
+
+    // when
+    const result = await checkCompletionConditions(ctx)
+
     // then
     expect(result).toBe(false)
   })