perf: 优化 dashboard 的查询性能 (#393)

crates/bili_sync_migration/src/lib.rs

@@ -7,6 +7,7 @@ mod m20240724_161008_submission;
 mod m20250122_062926_add_latest_row_at;
 mod m20250612_090826_add_enabled;
 mod m20250613_043257_add_config;
+mod m20250712_080013_add_video_created_at_index;
 
 pub struct Migrator;
 
@@ -21,6 +22,7 @@ impl MigratorTrait for Migrator {
             Box::new(m20250122_062926_add_latest_row_at::Migration),
             Box::new(m20250612_090826_add_enabled::Migration),
             Box::new(m20250613_043257_add_config::Migration),
+            Box::new(m20250712_080013_add_video_created_at_index::Migration),
         ]
     }
 }

crates/bili_sync_migration/src/m20250712_080013_add_video_created_at_index.rs

@@ -0,0 +1,36 @@
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .create_index(
+                Index::create()
+                    .table(Video::Table)
+                    .name("video_created_at_index")
+                    .col(Video::CreatedAt)
+                    .to_owned(),
+            )
+            .await
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .drop_index(
+                Index::drop()
+                    .table(Video::Table)
+                    .name("video_created_at_index")
+                    .to_owned(),
+            )
+            .await
+    }
+}
+
+#[derive(DeriveIden)]
+enum Video {
+    Table,
+    CreatedAt,
+}