diff --git a/backend b/backend
index 7b6def1..5916a9e 160000
--- a/backend
+++ b/backend
@@ -1 +1 @@
-Subproject commit 7b6def1c821d2ce3f9dab807a56fdf6dbed48af1
+Subproject commit 5916a9efbcca7366e6648c38b8e68f5fa8cee3e3
diff --git a/composed_pipeline.png b/composed_pipeline.png
new file mode 100644
index 0000000..38fb752
Binary files /dev/null and b/composed_pipeline.png differ
diff --git a/pipeline.png b/pipeline.png
deleted file mode 100644
index 2b86441..0000000
Binary files a/pipeline.png and /dev/null differ
diff --git a/uv.lock b/uv.lock
index 389260b..a05c47d 100644
--- a/uv.lock
+++ b/uv.lock
@@ -72,6 +72,7 @@ dependencies = [
     { name = "pydantic-settings" },
     { name = "pyjwt" },
     { name = "python-multipart" },
+    { name = "redis" },
     { name = "sentry-sdk", extra = ["fastapi"] },
     { name = "sqlmodel" },
     { name = "tenacity" },
@@ -103,6 +104,7 @@ requires-dist = [
     { name = "pydantic-settings", specifier = ">=2.2.1,<3.0.0" },
     { name = "pyjwt", specifier = ">=2.8.0,<3.0.0" },
     { name = "python-multipart", specifier = ">=0.0.7,<1.0.0" },
+    { name = "redis", specifier = ">=7.1.0" },
     { name = "sentry-sdk", extras = ["fastapi"], specifier = ">=1.40.6,<2.0.0" },
     { name = "sqlmodel", specifier = ">=0.0.21,<1.0.0" },
     { name = "tenacity", specifier = ">=8.2.3,<9.0.0" },
@@ -165,6 +167,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/ee/82/82745642d3c46e7cea25e1885b014b033f4693346ce46b7f47483cf5d448/argon2_cffi_bindings-25.1.0-pp310-pypy310_pp73-win_amd64.whl", hash = "sha256:da0c79c23a63723aa5d782250fbf51b768abca630285262fb5144ba5ae01e520", size = 29187, upload-time = "2025-07-30T10:02:03.674Z" },
 ]
 
+[[package]]
+name = "async-timeout"
+version = "5.0.1"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/a5/ae/136395dfbfe00dfc94da3f3e136d0b13f394cba8f4841120e34226265780/async_timeout-5.0.1.tar.gz", hash = "sha256:d9321a7a3d5a6a5e187e824d2fa0793ce379a202935782d555d6e9d2735677d3", size = 9274, upload-time = "2024-11-06T16:41:39.6Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/fe/ba/e2081de779ca30d473f21f5b30e0e737c438205440784c7dfc81efc2b029/async_timeout-5.0.1-py3-none-any.whl", hash = "sha256:39e3809566ff85354557ec2398b55e096c8364bacac9405a7a1fa429e77fe76c", size = 6233, upload-time = "2024-11-06T16:41:37.9Z" },
+]
+
 [[package]]
 name = "bcrypt"
 version = "4.3.0"
@@ -2334,6 +2345,18 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/f1/12/de94a39c2ef588c7e6455cfbe7343d3b2dc9d6b6b2f40c4c6565744c873d/pyyaml-6.0.3-cp314-cp314t-win_arm64.whl", hash = "sha256:ebc55a14a21cb14062aa4162f906cd962b28e2e9ea38f9b4391244cd8de4ae0b", size = 149341, upload-time = "2025-09-25T21:32:56.828Z" },
 ]
 
+[[package]]
+name = "redis"
+version = "7.1.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "async-timeout", marker = "python_full_version < '3.11.3'" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/43/c8/983d5c6579a411d8a99bc5823cc5712768859b5ce2c8afe1a65b37832c81/redis-7.1.0.tar.gz", hash = "sha256:b1cc3cfa5a2cb9c2ab3ba700864fb0ad75617b41f01352ce5779dabf6d5f9c3c", size = 4796669, upload-time = "2025-11-19T15:54:39.961Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/89/f0/8956f8a86b20d7bb9d6ac0187cf4cd54d8065bc9a1a09eb8011d4d326596/redis-7.1.0-py3-none-any.whl", hash = "sha256:23c52b208f92b56103e17c5d06bdc1a6c2c0b3106583985a76a18f83b265de2b", size = 354159, upload-time = "2025-11-19T15:54:38.064Z" },
+]
+
 [[package]]
 name = "requests"
 version = "2.32.5"