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)

OSGKeyboardShared/Features/Analytics/AnalyticsClient.swift

@@ -312,6 +312,9 @@ public struct AnalyticsRuntime: Sendable {
 
     /// Main-app runtime. A bearer provider may be supplied by host-only account
     /// code without making the shared framework depend on that code.
+    /// Production keyboard-extension processes must not construct this runtime
+    /// (or any other SQLite-backed analytics client): an open WAL connection is
+    /// killed as RunningBoard `0xdead10cc` when the keyboard hides.
     public static func mainApp(
         environment: AnalyticsEnvironment,
         repositoryConfiguration: AnalyticsRepositoryConfiguration = .appGroupDefault(),
@@ -341,36 +344,6 @@ public struct AnalyticsRuntime: Sendable {
         )
     }
 
-    /// Keyboard-extension runtime. This factory intentionally has no bearer
-    /// parameter, so extension uploads are anonymous by construction.
-    public static func keyboardExtension(
-        environment: AnalyticsEnvironment,
-        repositoryConfiguration: AnalyticsRepositoryConfiguration = .appGroupDefault(),
-        uploadConfiguration: AnalyticsUploadConfiguration,
-        network: any AnalyticsNetworking = URLSessionAnalyticsNetwork(),
-        wallClock: any AnalyticsWallClock = SystemAnalyticsWallClock(),
-        monotonicClock: any AnalyticsMonotonicClock = SystemAnalyticsMonotonicClock(),
-        uuidGenerator: any AnalyticsUUIDGenerating = SystemAnalyticsUUIDGenerator(),
-        random: any AnalyticsRandomGenerating = SystemAnalyticsRandomGenerator(),
-        trigger: any AnalyticsUploadTriggering = NoopAnalyticsUploadTrigger(),
-        logger: any AnalyticsLogging = NoopAnalyticsLogger()
-    ) -> Self {
-        Self(
-            surface: .keyboard,
-            environment: environment,
-            repositoryConfiguration: repositoryConfiguration,
-            uploadConfiguration: uploadConfiguration,
-            network: network,
-            bearerProvider: nil,
-            wallClock: wallClock,
-            monotonicClock: monotonicClock,
-            uuidGenerator: uuidGenerator,
-            random: random,
-            trigger: trigger,
-            logger: logger
-        )
-    }
-
     public func setEnabled(_ enabled: Bool) async {
         await repository.setEnabled(enabled)
     }