fix: keyboard stability, host-only analytics, and auto-reply dedupe

- record analytics/usage only in the host app; the extension no longer opens the
  SQLite queues, so hiding the keyboard cannot hold WAL locks (0xdead10cc)
- sync clipboard history writes across processes so deletes made on one side
  are not reverted by the other
- guard memory-relief reentrancy on controller and telemetry sides to break
  the recursive crash loop
- resolve credentials off the main thread and migrate legacy keys once per
  install, so Keychain reads cannot be caught in the suspend window
- gate Volcengine ASR ping completion to once (SIGTRAP on double resume)
- treat same-text captures as the same logical copy and dedupe auto actions
  by content fingerprint within 30s, stopping Universal Clipboard storms
- realign version line to 2.1.0 (build 110)

OSGKeyboardExt/Services/KeyboardFlowCoordinator.swift

@@ -170,6 +170,9 @@ final class KeyboardFlowCoordinator {
     /// the user returns from startflow and taps the Voice tab — height/appear
     /// noise used to call this again while `ready` briefly lagged).
     func ensurePiPReadyOnKeyboardOpen() {
+        #if DEBUG
+        MemoryDeviceProbe.log("pip.ensure.entry")
+        #endif
         guard FlowHandoffPolicy.allowsProactiveHostAutoLaunch,
               voiceSetupReady,
               hasFullAccess(),
@@ -198,6 +201,9 @@ final class KeyboardFlowCoordinator {
 
         FlowSessionBridge.markPiPArmAttempt()
         detectAndStoreAppContext()
+        #if DEBUG
+        MemoryDeviceProbe.log("pip.arm.beginFlowStart")
+        #endif
         beginFlowStart(recordAfterHandoff: false)
         traceState("keyboardOpen.autoArmPiP")
     }