fix: optimize visualization hot paths and refine bgp brief workspace

backend/app/api/v1/settings.py

@@ -79,6 +79,26 @@ async def get_setting_record(db: AsyncSession, category: str) -> Optional[System
     return result.scalar_one_or_none()
 
 
+async def get_setting_payloads(db: AsyncSession, categories: list[str]) -> dict[str, dict]:
+    if not categories:
+        return {}
+
+    result = await db.execute(
+        select(SystemSetting).where(SystemSetting.category.in_(categories))
+    )
+    records_by_category = {
+        record.category: record
+        for record in result.scalars().all()
+    }
+    return {
+        category: merge_with_defaults(
+            category,
+            records_by_category.get(category).payload if records_by_category.get(category) else None,
+        )
+        for category in categories
+    }
+
+
 async def get_setting_payload(db: AsyncSession, category: str) -> dict:
     record = await get_setting_record(db, category)
     return merge_with_defaults(category, record.payload if record else None)
@@ -212,10 +232,14 @@ async def get_all_settings(
 ):
     result = await db.execute(select(DataSource).order_by(DataSource.module, DataSource.id))
     datasources = result.scalars().all()
+    setting_payloads = await get_setting_payloads(
+        db,
+        ["system", "notifications", "security"],
+    )
     return {
-        "system": await get_setting_payload(db, "system"),
-        "notifications": await get_setting_payload(db, "notifications"),
-        "security": await get_setting_payload(db, "security"),
+        "system": setting_payloads["system"],
+        "notifications": setting_payloads["notifications"],
+        "security": setting_payloads["security"],
         "collectors": [serialize_collector(datasource) for datasource in datasources],
         "generated_at": to_iso8601_utc(datetime.now(UTC)),
     }