build(deps): bump langchain-core from 1.2.13 to 1.2.28 #1181

Job	Run time
find-tutorials	3s
test-10_async/00_base/000_hello_acp	2m 5s
test-00_sync/020_streaming	3m 2s
test-10_async/00_base/030_tracing	2m 1s
test-00_sync/000_hello_acp	2m 8s
test-00_sync/010_multiturn	3m 14s
test-10_async/00_base/010_multiturn	2m 47s
test-00_sync/030_langgraph	3m 18s
test-10_async/00_base/020_streaming	2m 47s
test-10_async/10_temporal/010_agent_chat	8m 1s
test-10_async/00_base/040_other_sdks	8m 10s
test-10_async/10_temporal/020_state_machine	8m 0s
test-10_async/10_temporal/000_hello_acp	2m 13s
test-10_async/10_temporal/050_agent_chat_guardrails	2m 2s
test-10_async/10_temporal/030_custom_activities	2m 1s
test-10_async/00_base/100_langgraph	2m 17s
test-10_async/00_base/080_batch_events	2m 59s
test-10_async/10_temporal/070_open_ai_agents_sdk_tools	2m 32s
test-10_async/10_temporal/080_open_ai_agents_sdk_human_in_the_loop	2m 23s
test-10_async/10_temporal/090_claude_agents_sdk_mvp	2m 4s
test-10_async/10_temporal/060_open_ai_agents_sdk_hello_world	2m 27s
Test Summary	5s
	1h 6m 39s

Provide feedback