fix: face_detections INSERT in pipeline, add dependency graph doc

src/core/db/postgres_db.rs

@@ -2193,6 +2193,21 @@ impl PostgresDb {
         Ok(())
     }
 
+    pub async fn store_face_detections_batch(
+        &self, uuid: &str, detections: &[(i64, f64, i32, i32, i32, i32, f32)]
+    ) -> Result<()> {
+        let table = schema::table_name("face_detections");
+        for (frame, ts, x, y, w, h, conf) in detections {
+            sqlx::query(&format!(
+                "INSERT INTO {} (file_uuid, frame_number, timestamp_secs, x, y, width, height, confidence) \
+                 VALUES ($1, $2, $3, $4, $5, $6, $7, $8) ON CONFLICT DO NOTHING", table
+            ))
+            .bind(uuid).bind(frame).bind(ts).bind(x).bind(y).bind(w).bind(h).bind(conf)
+            .execute(&self.pool).await?;
+        }
+        Ok(())
+    }
+
     pub async fn store_scene_pre_chunks_batch(&self, uuid: &str, scenes: &[(i64, i64, i64, f64, f64, serde_json::Value)]) -> Result<()> {
         let table = schema::table_name("pre_chunks");
         for (_i, _sf, _ef, start, end, data) in scenes {