diff --git a/backend/uv.lock b/backend/uv.lock
index 16ba806..b1028fc 100644
--- a/backend/uv.lock
+++ b/backend/uv.lock
@@ -1,5 +1,5 @@
 version = 1
-revision = 2
+revision = 3
 requires-python = "==3.11.*"
 resolution-markers = [
     "sys_platform == 'win32'",
@@ -396,7 +396,6 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/f3/47/16400cb42d18d7a6bb46f0626852c1718612e35dcb0dffa16bbaffdf5dd2/greenlet-3.3.2-cp311-cp311-macosx_11_0_universal2.whl", hash = "sha256:c56692189a7d1c7606cb794be0a8381470d95c57ce5be03fb3d0ef57c7853b86", size = 278890, upload-time = "2026-02-20T20:19:39.263Z" },
     { url = "https://files.pythonhosted.org/packages/a3/90/42762b77a5b6aa96cd8c0e80612663d39211e8ae8a6cd47c7f1249a66262/greenlet-3.3.2-cp311-cp311-manylinux_2_24_aarch64.manylinux_2_28_aarch64.whl", hash = "sha256:1ebd458fa8285960f382841da585e02201b53a5ec2bac6b156fc623b5ce4499f", size = 581120, upload-time = "2026-02-20T20:47:30.161Z" },
     { url = "https://files.pythonhosted.org/packages/bf/6f/f3d64f4fa0a9c7b5c5b3c810ff1df614540d5aa7d519261b53fba55d4df9/greenlet-3.3.2-cp311-cp311-manylinux_2_24_ppc64le.manylinux_2_28_ppc64le.whl", hash = "sha256:a443358b33c4ec7b05b79a7c8b466f5d275025e750298be7340f8fc63dff2a55", size = 594363, upload-time = "2026-02-20T20:55:56.965Z" },
-    { url = "https://files.pythonhosted.org/packages/9c/8b/1430a04657735a3f23116c2e0d5eb10220928846e4537a938a41b350bed6/greenlet-3.3.2-cp311-cp311-manylinux_2_24_s390x.manylinux_2_28_s390x.whl", hash = "sha256:4375a58e49522698d3e70cc0b801c19433021b5c37686f7ce9c65b0d5c8677d2", size = 605046, upload-time = "2026-02-20T21:02:45.234Z" },
     { url = "https://files.pythonhosted.org/packages/72/83/3e06a52aca8128bdd4dcd67e932b809e76a96ab8c232a8b025b2850264c5/greenlet-3.3.2-cp311-cp311-manylinux_2_24_x86_64.manylinux_2_28_x86_64.whl", hash = "sha256:8e2cd90d413acbf5e77ae41e5d3c9b3ac1d011a756d7284d7f3f2b806bbd6358", size = 594156, upload-time = "2026-02-20T20:20:59.955Z" },
     { url = "https://files.pythonhosted.org/packages/70/79/0de5e62b873e08fe3cef7dbe84e5c4bc0e8ed0c7ff131bccb8405cd107c8/greenlet-3.3.2-cp311-cp311-musllinux_1_2_aarch64.whl", hash = "sha256:442b6057453c8cb29b4fb36a2ac689382fc71112273726e2423f7f17dc73bf99", size = 1554649, upload-time = "2026-02-20T20:49:32.293Z" },
     { url = "https://files.pythonhosted.org/packages/5a/00/32d30dee8389dc36d42170a9c66217757289e2afb0de59a3565260f38373/greenlet-3.3.2-cp311-cp311-musllinux_1_2_x86_64.whl", hash = "sha256:45abe8eb6339518180d5a7fa47fa01945414d7cca5ecb745346fc6a87d2750be", size = 1619472, upload-time = "2026-02-20T20:21:07.966Z" },
@@ -590,7 +589,7 @@ wheels = [
 
 [[package]]
 name = "langchain-core"
-version = "1.2.19"
+version = "1.2.31"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "jsonpatch" },
@@ -602,21 +601,21 @@ dependencies = [
     { name = "typing-extensions" },
     { name = "uuid-utils" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/ac/da/075720d37ebc668f48743bd540b047b2b08b8ba22b46d8f61166c5ad1d1c/langchain_core-1.2.19.tar.gz", hash = "sha256:87fa82c3eb4cc3d7a65f574cb447b5df09ec2131c8c2a0a02d4737ad02685438", size = 836647, upload-time = "2026-03-13T13:44:54.8Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/a1/5a/7523ff55668a233beef7e909e8e2074a1cc3b620e0bbf0a4ec5f38549b3b/langchain_core-1.2.31.tar.gz", hash = "sha256:aad3ecc9e4dce2dd2bb79526c81b92e5322fd81db7834a031cb80359f2e3ebaa", size = 850756, upload-time = "2026-04-16T13:26:29.241Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/aa/cb/8704b2a22c0987627ed29464d23a45fb15e10a28fb482f4d84c3bddcbf27/langchain_core-1.2.19-py3-none-any.whl", hash = "sha256:6e74cb0fb443a8046ee298c05c99b67abe54cc57fcbc6d1cd3b0f2485ee47574", size = 503456, upload-time = "2026-03-13T13:44:53.241Z" },
+    { url = "https://files.pythonhosted.org/packages/52/02/668ddf4f1cf963ad691bdbea672a85244e6271eb0a4acfaf662bbd94a3b1/langchain_core-1.2.31-py3-none-any.whl", hash = "sha256:c407193edb99311cc36ec3e4d3667a065bbc4d7d72fbb6e368538b9b134d4033", size = 513264, upload-time = "2026-04-16T13:26:27.566Z" },
 ]
 
 [[package]]
 name = "langchain-text-splitters"
-version = "1.1.1"
+version = "1.1.2"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "langchain-core" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/85/38/14121ead61e0e75f79c3a35e5148ac7c2fe754a55f76eab3eed573269524/langchain_text_splitters-1.1.1.tar.gz", hash = "sha256:34861abe7c07d9e49d4dc852d0129e26b32738b60a74486853ec9b6d6a8e01d2", size = 279352, upload-time = "2026-02-18T23:02:42.798Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/26/9f/6c545900fefb7b00ddfa3f16b80d61338a0ec68c31c5451eeeab99082760/langchain_text_splitters-1.1.2.tar.gz", hash = "sha256:782a723db0a4746ac91e251c7c1d57fd23636e4f38ed733074e28d7a86f41627", size = 293580, upload-time = "2026-04-16T14:20:39.162Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/84/66/d9e0c3b83b0ad75ee746c51ba347cacecb8d656b96e1d513f3e334d1ccab/langchain_text_splitters-1.1.1-py3-none-any.whl", hash = "sha256:5ed0d7bf314ba925041e7d7d17cd8b10f688300d5415fb26c29442f061e329dc", size = 35734, upload-time = "2026-02-18T23:02:41.913Z" },
+    { url = "https://files.pythonhosted.org/packages/d3/26/1ef06f56198d631296d646a6223de35bcc6cf9795ceb2442816bc963b84c/langchain_text_splitters-1.1.2-py3-none-any.whl", hash = "sha256:a2de0d799ff31886429fd6e2e0032df275b60ec817c19059a7b46181cc1c2f10", size = 35903, upload-time = "2026-04-16T14:20:38.243Z" },
 ]
 
 [[package]]