cleanup: remove dead code and duplicate docs

- Remove session-ses_2f27.md (161KB raw session log)
- Remove 49 ROOT_* duplicate files across REFERENCE/
- Remove 14 duplicate files between REFERENCE/ root and history/
- Remove asr_legacy.rs (dead code, replaced by asr.rs)
- Remove src/core/worker/ (duplicate JobWorker)
- Remove src/core/layers/ (empty directory)
- Remove 4 .bak files in src/
- Remove 7 dead private methods in worker/processor.rs
- Remove backup directory from git tracking

src/playground.rs

@@ -978,6 +978,11 @@ async fn main() -> Result<()> {
                 registration_time: None,
                 total_frames: total_frames.unwrap_or(0),
                 parent_uuid: None,
+                cut_done: false,
+                cut_count: 0,
+                cut_max_duration: 0.0,
+                scene_done: false,
+                audio_tracks: None,
             };
 
             let video_id = db.register_video(&record).await?;
@@ -1936,6 +1941,7 @@ async fn main() -> Result<()> {
                         momentry_core::core::processor::asrx::AsrxResult {
                             language: None,
                             segments: vec![],
+                            embeddings: None,
                         }
                     }
                 },
@@ -1944,6 +1950,7 @@ async fn main() -> Result<()> {
                     momentry_core::core::processor::asrx::AsrxResult {
                         language: None,
                         segments: vec![],
+                        embeddings: None,
                     }
                 }
             };
@@ -2123,7 +2130,7 @@ async fn main() -> Result<()> {
                 let speaker_id = asrx_result
                     .segments
                     .iter()
-                    .find(|ax| ax.start <= seg.end && ax.end >= seg.start)
+                    .find(|ax| ax.start_time <= seg.end && ax.end_time >= seg.start)
                     .and_then(|ax| ax.speaker_id.clone());
 
                 let content = if let Some(ref sid) = speaker_id {