feat: Phase 1 handover - schema migration, correction mechanism, API fixes

Schema changes: dev.chunks->dev.chunk, remove old_chunk_id/chunk_index
Correction: asr-1.json format, generate/apply scripts
API: 37/37 endpoints fixed and tested
Docs: HANDOVER_V2.0.md for M4

src/core/processor/asr.rs

@@ -1,11 +1,8 @@
 use anyhow::{Context, Result};
 use serde::{Deserialize, Serialize};
-use std::time::Duration;
 
 use super::executor::PythonExecutor;
 
-const ASR_TIMEOUT: Duration = Duration::from_secs(1800); // 30 minutes
-
 #[derive(Debug, Serialize, Deserialize)]
 pub struct AsrResult {
     pub language: Option<String>,
@@ -36,7 +33,7 @@ pub async fn process_asr(
             &[video_path, output_path],
             uuid,
             "ASR",
-            Some(ASR_TIMEOUT),
+            None,
         )
         .await
         .with_context(|| format!("Failed to run {:?}", script_path))?;

src/core/processor/executor.rs

@@ -247,7 +247,10 @@ impl PythonExecutor {
                             let mut partial_path = out.to_path_buf();
                             partial_path.set_extension("json.partial");
                             let _ = std::fs::rename(tmp, &partial_path);
-                            tracing::warn!("[Executor] Partial output preserved: {:?}", partial_path);
+                            tracing::warn!(
+                                "[Executor] Partial output preserved: {:?}",
+                                partial_path
+                            );
                         } else {
                             let mut err_path = out.to_path_buf();
                             err_path.set_extension("json.err");

src/core/processor/visual_chunk.rs

@@ -131,7 +131,7 @@ fn create_fixed_frame_chunks(
         let chunk = crate::core::chunk::Chunk::from_yolo_frames(
             file_id,
             uuid.to_string(),
-            chunk_index,
+            format!("vis_{}", chunk_index),
             start_frame,
             end_frame,
             fps,
@@ -190,7 +190,7 @@ fn create_similarity_based_chunks(
                 let chunk = crate::core::chunk::Chunk::from_yolo_frames(
                     file_id,
                     uuid.to_string(),
-                    chunk_index,
+                    format!("vis_{}", chunk_index),
                     current_start_frame,
                     end_frame,
                     fps,
@@ -214,7 +214,7 @@ fn create_similarity_based_chunks(
         let chunk = crate::core::chunk::Chunk::from_yolo_frames(
             file_id,
             uuid.to_string(),
-            chunk_index,
+            format!("vis_{}", chunk_index),
             current_start_frame,
             end_frame,
             fps,