Discord: thread bindings idle + max-age lifecycle (#27845) (thanks @osolmaz)

* refactor discord thread bindings to idle and max-age lifecycle

* fix: migrate legacy thread binding expiry and reduce hot-path disk writes

* refactor: remove remaining thread-binding ttl legacy paths

* fix: harden thread-binding lifecycle persistence

* Discord: fix thread binding types in message/reply paths

* Infra: handle win32 unknown inode in file identity checks

* Infra: relax win32 guarded-open identity checks

* Config: migrate threadBindings ttlHours to idleHours

* Revert "Infra: relax win32 guarded-open identity checks"

This reverts commit de94126771.

* Revert "Infra: handle win32 unknown inode in file identity checks"

This reverts commit 96fc5ddfb3.

* Discord: re-read live binding state before sweep unbind

* fix: add changelog note for thread binding lifecycle update (#27845) (thanks @osolmaz)

---------

Co-authored-by: Onur Solmaz <onur@textcortex.com>

src/discord/monitor/provider.test.ts

@@ -18,8 +18,6 @@ const {
   resolveDiscordAllowlistConfigMock,
   resolveNativeCommandsEnabledMock,
   resolveNativeSkillsEnabledMock,
-  resolveThreadBindingSessionTtlMsMock,
-  resolveThreadBindingsEnabledMock,
 } = vi.hoisted(() => {
   const createdBindingManagers: Array<{ stop: ReturnType<typeof vi.fn> }> = [];
   return {
@@ -63,8 +61,6 @@ const {
     })),
     resolveNativeCommandsEnabledMock: vi.fn(() => true),
     resolveNativeSkillsEnabledMock: vi.fn(() => false),
-    resolveThreadBindingSessionTtlMsMock: vi.fn(() => undefined),
-    resolveThreadBindingsEnabledMock: vi.fn(() => true),
   };
 });
 
@@ -235,8 +231,6 @@ vi.mock("./thread-bindings.js", () => ({
   createNoopThreadBindingManager: createNoopThreadBindingManagerMock,
   createThreadBindingManager: createThreadBindingManagerMock,
   reconcileAcpThreadBindingsOnStartup: reconcileAcpThreadBindingsOnStartupMock,
-  resolveThreadBindingSessionTtlMs: resolveThreadBindingSessionTtlMsMock,
-  resolveThreadBindingsEnabled: resolveThreadBindingsEnabledMock,
 }));
 
 describe("monitorDiscordProvider", () => {
@@ -283,8 +277,6 @@ describe("monitorDiscordProvider", () => {
     });
     resolveNativeCommandsEnabledMock.mockClear().mockReturnValue(true);
     resolveNativeSkillsEnabledMock.mockClear().mockReturnValue(false);
-    resolveThreadBindingSessionTtlMsMock.mockClear().mockReturnValue(undefined);
-    resolveThreadBindingsEnabledMock.mockClear().mockReturnValue(true);
   });
 
   it("stops thread bindings when startup fails before lifecycle begins", async () => {