refactor: cargo fmt across 27 files + behavioral fixes

Behavioral changes:
- postgres_db: reorder default processors (cut first), prevent overwriting completed status
- qdrant_db: fix scroll pagination exit condition (next.is_none())
- job_worker: add idempotency guards for face trace / TKG build; better error logging
- main.rs: add LineWriter for stdout buffering

Remaining diff is cargo fmt reformatting (line wrapping, import ordering).

src/worker/processor.rs

@@ -1505,7 +1505,13 @@ impl ProcessorPool {
                 "end_frame": segment.end_frame,
             });
 
-            pre_chunks_to_store.push((segment.start_frame as i64, Some(segment.start_time), data, None, None));
+            pre_chunks_to_store.push((
+                segment.start_frame as i64,
+                Some(segment.start_time),
+                data,
+                None,
+                None,
+            ));
 
             speaker_detections.push((
                 segment.speaker_id.clone().unwrap_or_default(),