refactor: expose last_transcript as public property for cleaner API

Co-authored-by: LeafCreeper <120477804+LeafCreeper@users.noreply.github.com>

Author: Copilot

main.py

@@ -126,7 +126,7 @@ def process_lecture(
                 else:
                     print(f"  {tag} [FAIL] All {max_attempts} attempts got incomplete audio, using best result.")
                     # Use the partial transcript rather than failing entirely
-                    transcript = transcriber._last_transcript
+                    transcript = transcriber.last_transcript
                     db.update_transcript(sub_id, transcript)
             except NoAudioStreamError as e:
                 print(f"  {tag} [SKIP] Video-only (no audio stream): {e}")

src/transcriber.py

@@ -60,6 +60,13 @@ def _media_duration(self):
     def _media_duration(self, value):
         self._local.media_duration = value
 
+    @property
+    def last_transcript(self):
+        """Public access to the transcript from the most recent transcription
+        on the *current* thread.  Used as a fallback when all retry attempts
+        for incomplete audio fail."""
+        return self._last_transcript
+
     # -- initialisation ---------------------------------------------------
 
     def _init(self):