docs: clarify LiveDictationController and DictationBridge status

Both classes are kept in v0.1.2 (they serve the in-app keyboard
preview and the one-shot host-app dictation handoff path), but
their primary role was taken over by FlowSessionManager +
FlowContinuousCapture in v0.1.1. Add a STATUS section to each
file header explaining the current role and listing the call
sites, so future readers do not assume they are dead code and
try to delete them (which would break PreviewASRController and
KeyboardPreviewSheet).

Refs: AUDIT_APPSTORE.md P0-3

OSGKeyboardShared/Services/DictationBridge.swift

@@ -5,6 +5,12 @@
 //   keyboard extension -> open host app for recording
 //   host app           -> writes final transcript
 //   keyboard extension -> consumes pending transcript and inserts text
+//
+// STATUS (v0.1.2): Retained. Consumed by `KeyboardViewController` for
+// the "one-shot" host-app dictation path (where the keyboard extension
+// launches the host app, the user records there, and the resulting
+// text is consumed back by the extension). The *continuous* path goes
+// through `FlowSessionBridge` + `FlowSessionManager` instead.
 
 import Foundation
 

OSGKeyboardShared/Services/LiveDictationController.swift

@@ -4,6 +4,22 @@
 // Unified on-device dictation session: mic capture + iOS 26 SpeechAnalyzer.
 // Used by the keyboard preview sheet, host-app dictation handoff, and any
 // other foreground surface that needs live ASR without duplicating pipeline code.
+//
+// STATUS (v0.1.2): Retained as a "preview / one-shot handoff" path.
+// The *primary* voice-session path is `FlowSessionManager` +
+// `FlowContinuousCapture` (TypeWhisper-style continuous capture shared
+// between host app and keyboard extension). The keyboard extension
+// consumes results through `FlowSessionBridge`.
+//
+// This class is still imported by:
+//   - `OSGKeyboard/Views/PreviewASRController.swift` (typealias)
+//   - `OSGKeyboard/Views/KeyboardPreviewSheet.swift` (in-app preview)
+//   - `OSGKeyboard/Views/DictationCaptureView.swift` (host-app fallback)
+//   - `OSGKeyboardTests/PreviewASRControllerStateTests.swift`
+//
+// Do NOT remove without updating those call sites. The earlier
+// `OSGKeyboardExt/Services/AudioCaptureService.swift` *was* a true
+// dead duplicate and has been deleted (see AUDIT_APPSTORE.md P0-3).
 // Owns its own AVAudioEngine + AVAudioSession, downsamples to 16 kHz
 // mono Float32 on the audio thread (same as `AudioCaptureService`), and
 // feeds `AudioBufferSnapshot` to the shared `ASRService` (the same