perf(easytier-web): improve easytier-web webhook performance (#2383)

* feat(web): reconcile managed config revisions
* feat(web): cache managed runtime configs per session
* test: cover managed web config delivery

easytier-web/src/migrator/m20260619_000005_managed_config_revisions.rs

@@ -0,0 +1,46 @@
+use sea_orm_migration::prelude::*;
+
+pub struct Migration;
+
+impl MigrationName for Migration {
+    fn name(&self) -> &str {
+        "m20260619_000005_managed_config_revisions"
+    }
+}
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .get_connection()
+            .execute_unprepared(
+                r#"
+                CREATE TABLE managed_config_revisions (
+                    id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+                    user_id INTEGER NOT NULL,
+                    device_id TEXT NOT NULL,
+                    config_revision TEXT NOT NULL,
+                    create_time TEXT NOT NULL,
+                    update_time TEXT NOT NULL,
+                    CONSTRAINT fk_managed_config_revisions_user_id_to_users_id
+                        FOREIGN KEY (user_id) REFERENCES users(id)
+                        ON DELETE CASCADE
+                        ON UPDATE CASCADE
+                );
+
+                CREATE UNIQUE INDEX idx_managed_config_revisions_scope
+                    ON managed_config_revisions(user_id, device_id);
+                "#,
+            )
+            .await?;
+        Ok(())
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .get_connection()
+            .execute_unprepared("DROP TABLE managed_config_revisions;")
+            .await?;
+        Ok(())
+    }
+}

easytier-web/src/migrator/mod.rs

@@ -4,6 +4,7 @@ mod m20241029_000001_init;
 mod m20260403_000002_scope_network_config_unique;
 mod m20260421_000003_add_network_config_source;
 mod m20260514_000004_rename_web_config_source;
+mod m20260619_000005_managed_config_revisions;
 
 pub struct Migrator;
 
@@ -15,6 +16,7 @@ impl MigratorTrait for Migrator {
             Box::new(m20260403_000002_scope_network_config_unique::Migration),
             Box::new(m20260421_000003_add_network_config_source::Migration),
             Box::new(m20260514_000004_rename_web_config_source::Migration),
+            Box::new(m20260619_000005_managed_config_revisions::Migration),
         ]
     }
 }