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/thread-bindings.ts

@@ -5,7 +5,7 @@ export type {
 } from "./thread-bindings.types.js";
 
 export {
-  formatThreadBindingTtlLabel,
+  formatThreadBindingDurationLabel,
   resolveThreadBindingIntroText,
   resolveThreadBindingThreadName,
 } from "./thread-bindings.messages.js";
@@ -15,19 +15,26 @@ export {
 } from "./thread-bindings.persona.js";
 
 export {
-  resolveDiscordThreadBindingSessionTtlMs,
-  resolveThreadBindingSessionTtlMs,
+  resolveDiscordThreadBindingIdleTimeoutMs,
+  resolveDiscordThreadBindingMaxAgeMs,
   resolveThreadBindingsEnabled,
 } from "./thread-bindings.config.js";
 
-export { isRecentlyUnboundThreadWebhookMessage } from "./thread-bindings.state.js";
+export {
+  isRecentlyUnboundThreadWebhookMessage,
+  resolveThreadBindingIdleTimeoutMs,
+  resolveThreadBindingInactivityExpiresAt,
+  resolveThreadBindingMaxAgeExpiresAt,
+  resolveThreadBindingMaxAgeMs,
+} from "./thread-bindings.state.js";
 
 export {
   autoBindSpawnedDiscordSubagent,
   listThreadBindingsBySessionKey,
   listThreadBindingsForAccount,
   reconcileAcpThreadBindingsOnStartup,
-  setThreadBindingTtlBySessionKey,
+  setThreadBindingIdleTimeoutBySessionKey,
+  setThreadBindingMaxAgeBySessionKey,
   unbindThreadBindingsBySessionKey,
 } from "./thread-bindings.lifecycle.js";