chore(deps): update dependency alembic to v1.20.1

backend/uv.lock

@@ -21,16 +21,16 @@ wheels = [
 
 [[package]]
 name = "alembic"
-version = "1.20.0"
+version = "1.20.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "mako" },
     { name = "sqlalchemy" },
     { name = "typing-extensions" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/ed/aa/02910bdb8e2f1444f6654d5b296cd827d126f82209050ee7b1000f92ac4b/alembic-1.20.0.tar.gz", hash = "sha256:db505480647bc60386c5369402f4a57a506b7539c9e9ef5e270d45cbbe4939bf", size = 2093272, upload-time = "2026-09-11T19:09:11.126Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/93/1c/00909e0fbebad2121d916fdcab044cae988146680e9ee4387ba25fef8747/alembic-1.20.1.tar.gz", hash = "sha256:83490def1f723413db5096591f7609ac52544805be93849170088ed04f5a2e0b", size = 2103576, upload-time = "2026-10-22T03:24:35.93Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/3f/27/78a89b55b0904d222183164e079b4ca56208e94eff1d35ad1f1ad5be9b06/alembic-1.20.0-py3-none-any.whl", hash = "sha256:77eb101048d95f982c0353e9233404889dcd7a6fc244c107836c0e2fc9cf7d9d", size = 268719, upload-time = "2026-09-11T19:09:12.88Z" },
+    { url = "https://files.pythonhosted.org/packages/11/3c/8740f5b4e1bd57333e4f84265b9b6363da4f7cf70f5622dd1e2fde7a0bd5/alembic-1.20.1-py3-none-any.whl", hash = "sha256:9970712cfb81ea26c8658d378aaa5b8f6ff9146e5bb111d70497c164016cf598", size = 270355, upload-time = "2026-10-22T03:24:37.667Z" },
 ]
 
 [[package]]