fix: add async cache to async operations and sync cache (stdlib) for sync operations

uv.lock

@@ -47,6 +47,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/da/42/e921fccf5015463e32a3cf6ee7f980a6ed0f395ceeaa45060b61d86486c2/anyio-4.13.0-py3-none-any.whl", hash = "sha256:08b310f9e24a9594186fd75b4f73f4a4152069e3853f1ed8bfbf58369f4ad708", size = 114353, upload-time = "2026-03-24T12:59:08.246Z" },
 ]
 
+[[package]]
+name = "async-lru"
+version = "2.3.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/e8/1f/989ecfef8e64109a489fff357450cb73fa73a865a92bd8c272170a6922c2/async_lru-2.3.0.tar.gz", hash = "sha256:89bdb258a0140d7313cf8f4031d816a042202faa61d0ab310a0a538baa1c24b6", size = 16332, upload-time = "2026-03-19T01:04:32.413Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/e5/e2/c2e3abf398f80732e58b03be77bde9022550d221dd8781bf586bd4d97cc1/async_lru-2.3.0-py3-none-any.whl", hash = "sha256:eea27b01841909316f2cc739807acea1c623df2be8c5cfad7583286397bb8315", size = 8403, upload-time = "2026-03-19T01:04:30.883Z" },
+]
+
 [[package]]
 name = "beautifulsoup4"
 version = "4.15.0"
@@ -889,10 +898,11 @@ wheels = [
 
 [[package]]
 name = "uvpn-backend"
-version = "0.1.0"
+version = "0.2.0"
 source = { virtual = "." }
 dependencies = [
     { name = "aiofiles" },
+    { name = "async-lru" },
     { name = "bs4" },
     { name = "fastapi" },
     { name = "httpx" },
@@ -907,6 +917,7 @@ dev = [
 [package.metadata]
 requires-dist = [
     { name = "aiofiles", specifier = ">=25.1.0" },
+    { name = "async-lru", specifier = ">=2.3.0" },
     { name = "bs4", specifier = ">=0.0.2" },
     { name = "fastapi", specifier = ">=0.136.3" },
     { name = "httpx", specifier = ">=0.28.1" },