release(core): release 1.2.28 (#36614)

release 1.27.8

libs/core/langchain_core/version.py

@@ -1,3 +1,3 @@
 """langchain-core version information and utilities."""
 
-VERSION = "1.2.27"
+VERSION = "1.2.28"

libs/core/pyproject.toml

@@ -21,7 +21,7 @@ classifiers = [
     "Topic :: Software Development :: Libraries :: Python Modules",
 ]
 
-version = "1.2.27"
+version = "1.2.28"
 requires-python = ">=3.10.0,<4.0.0"
 dependencies = [
     "langsmith>=0.3.45,<1.0.0",

libs/core/uv.lock

@@ -1,5 +1,5 @@
 version = 1
-revision = 2
+revision = 3
 requires-python = ">=3.10.0, <4.0.0"
 resolution-markers = [
     "python_full_version >= '3.14' and platform_python_implementation == 'PyPy'",
@@ -995,7 +995,7 @@ wheels = [
 
 [[package]]
 name = "langchain-core"
-version = "1.2.27"
+version = "1.2.28"
 source = { editable = "." }
 dependencies = [
     { name = "jsonpatch" },
@@ -1089,7 +1089,7 @@ typing = [
 
 [[package]]
 name = "langchain-tests"
-version = "1.1.5"
+version = "1.1.6"
 source = { directory = "../standard-tests" }
 dependencies = [
     { name = "httpx" },