fix(acp): drain runtime handles on gateway shutdown (#121359)

* fix(acp): drain runtime handles on gateway shutdown

* refactor(acp): isolate manager shutdown lifecycle

* style(acp): brace lifecycle guard

* fix(acp): cancel active turns before shutdown drain

* fix(acpx): reap process tree before wrapper close

* fix(test): diagnose surviving Vitest process groups

* fix(test): type process completion signals portably

* fix(test): reap orphaned live Docker workers

* fix(test): preserve child signal typing

* fix(gateway): retain ACPX through manager drain

* test(gateway): type deferred ACP disposal exactly

test/scripts/live-docker-auth.test.ts

@@ -219,6 +219,7 @@ describe("scripts/lib/live-docker-auth.sh", () => {
       "42s",
       "docker",
       "run",
+      "--init",
       "--memory",
       "8g",
       "--cpus",
@@ -270,6 +271,7 @@ describe("scripts/lib/live-docker-auth.sh", () => {
       "42s",
       "docker",
       "run",
+      "--init",
       "--memory",
       "8g",
       "--cpus",
@@ -293,6 +295,7 @@ describe("scripts/lib/live-docker-auth.sh", () => {
       "42s",
       "docker",
       "run",
+      "--init",
       "--memory",
       "8g",
       "--cpus",
@@ -322,6 +325,7 @@ describe("scripts/lib/live-docker-auth.sh", () => {
       "42s",
       "docker",
       "run",
+      "--init",
       "--memory",
       "8g",
       "--cpus",
@@ -373,6 +377,7 @@ describe("scripts/lib/live-docker-auth.sh", () => {
       "42s",
       "docker",
       "run",
+      "--init",
     ]);
   });
 

test/scripts/vitest-process-group.test.ts

@@ -5,6 +5,7 @@ import {
   createVitestProcessCompletion,
   forwardSignalToVitestProcessGroup,
   installVitestProcessGroupCleanup,
+  parseVitestProcessGroupMembers,
   resolveVitestProcessGroupSignalTarget,
   shouldUseDetachedVitestProcessGroup,
 } from "../../scripts/vitest-process-group.mts";
@@ -42,6 +43,15 @@ describe("vitest process group helpers", () => {
     );
   });
 
+  it("formats bounded process-group diagnostics without command arguments", () => {
+    expect(
+      parseVitestProcessGroupMembers(
+        [" 116 1 116 Z node", " 117 1 116 Sl claude", " 118 1 999 S unrelated"].join("\n"),
+        116,
+      ),
+    ).toBe("pid=116 ppid=1 state=Z comm=node; pid=117 ppid=1 state=Sl comm=claude");
+  });
+
   it("forwards signals to the computed target and ignores cleanup races", () => {
     const kill = vi.fn();
     expect(