🔧(backend) add rerankers package with API dependencies

i am adding the reranker dependency and updating the lock file

src/backend/pyproject.toml

@@ -44,6 +44,7 @@ dependencies = [
     "pydantic==2.12.5",
     "pyjwt==2.10.1",
     "requests==2.32.5",
+    "rerankers[api]==0.10.0",
     "sentry-sdk==2.48.0",
     "url-normalize==2.2.1",
     "opensearch-py==3.1.0",

src/backend/uv.lock

@@ -514,6 +514,7 @@ dependencies = [
     { name = "pyjwt" },
     { name = "redis" },
     { name = "requests" },
+    { name = "rerankers", extra = ["api"] },
     { name = "sentry-sdk" },
     { name = "url-normalize" },
     { name = "whitenoise" },
@@ -574,6 +575,7 @@ requires-dist = [
     { name = "pytest-xdist", marker = "extra == 'dev'", specifier = "==3.8.0" },
     { name = "redis", specifier = "==5.3.1" },
     { name = "requests", specifier = "==2.32.5" },
+    { name = "rerankers", extras = ["api"], specifier = "==0.10.0" },
     { name = "responses", marker = "extra == 'dev'", specifier = "==0.25.8" },
     { name = "ruff", marker = "extra == 'dev'", specifier = "==0.14.10" },
     { name = "sentry-sdk", specifier = "==2.48.0" },
@@ -1417,6 +1419,20 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/3f/51/d4db610ef29373b879047326cbf6fa98b6c1969d6f6dc423279de2b1be2c/requests_toolbelt-1.0.0-py2.py3-none-any.whl", hash = "sha256:cccfdd665f0a24fcf4726e690f65639d272bb0637b9b92dfd91a5568ccf6bd06", size = 54481, upload-time = "2023-05-01T04:11:28.427Z" },
 ]
 
+[[package]]
+name = "rerankers"
+version = "0.10.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/a2/1e/3ed2026be7c135939905eac4f50d1bf8339180821c6757b2e91b83de2fa5/rerankers-0.10.0.tar.gz", hash = "sha256:b8e8b363abc4e9757151956949c27b197993c0a774437287a932f855afc17a73", size = 49679, upload-time = "2025-05-22T08:22:53.396Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/df/ed/f3b81ca8743d69b95d679b95e6e1d22cb7cc678ae77c6a57827303a7e48c/rerankers-0.10.0-py3-none-any.whl", hash = "sha256:634a6befa130a245ed46022ade217ee482869448f01aae2051ed54d7d5bd2791", size = 53084, upload-time = "2025-05-22T08:22:52.022Z" },
+]
+
+[package.optional-dependencies]
+api = [
+    { name = "requests" },
+]
+
 [[package]]
 name = "responses"
 version = "0.25.8"