optimize db connection

uv.lock

@@ -95,13 +95,24 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/fb/76/641ae371508676492379f16e2fa48f4e2c11741bd63c48be4b12a6b09cba/aiosignal-1.4.0-py3-none-any.whl", hash = "sha256:053243f8b92b990551949e63930a839ff0cf0b0ebbe0597b0f3fb19e1a0fe82e", size = 7490, upload-time = "2025-07-03T22:54:42.156Z" },
 ]
 
+[[package]]
+name = "aiosqlite"
+version = "0.22.1"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/4e/8a/64761f4005f17809769d23e518d915db74e6310474e733e3593cfc854ef1/aiosqlite-0.22.1.tar.gz", hash = "sha256:043e0bd78d32888c0a9ca90fc788b38796843360c855a7262a532813133a0650", size = 14821, upload-time = "2025-12-23T19:25:43.997Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/00/b7/e3bf5133d697a08128598c8d0abc5e16377b51465a33756de24fa7dee953/aiosqlite-0.22.1-py3-none-any.whl", hash = "sha256:21c002eb13823fad740196c5a2e9d8e62f6243bd9e7e4a1f87fb5e44ecb4fceb", size = 17405, upload-time = "2025-12-23T19:25:42.139Z" },
+]
+
 [[package]]
 name = "akern"
 version = "0.1.0"
 source = { virtual = "." }
 dependencies = [
+    { name = "aiosqlite" },
     { name = "fastapi", extra = ["standard"] },
     { name = "google-cloud-discoveryengine" },
+    { name = "greenlet" },
     { name = "langchain" },
     { name = "langchain-community" },
     { name = "langchain-core" },
@@ -121,9 +132,11 @@ dev = [
 
 [package.metadata]
 requires-dist = [
+    { name = "aiosqlite", specifier = ">=0.22.1" },
     { name = "fastapi", specifier = ">=0.129.0" },
     { name = "fastapi", extras = ["standard"] },
     { name = "google-cloud-discoveryengine", specifier = ">=0.17.0" },
+    { name = "greenlet", specifier = ">=3.3.1" },
     { name = "langchain", specifier = ">=1.2.10" },
     { name = "langchain-community", specifier = ">=0.4.1" },
     { name = "langchain-core", specifier = ">=1.2.13" },