Pass context between AssistantAgent for handoffs #3607

Job	Run time
mypy (./packages/autogen-core)	2m 30s
mypy (./packages/autogen-magentic-one)	1m 31s
mypy (./packages/agbench)	56s
mypy (./packages/autogen-ext)	2m 3s
mypy (./packages/autogen-agentchat)	1m 21s
mypy (./packages/magentic-one-cli)	1m 22s
docs (./packages/autogen-core)	1m 32s
docs-example-check (./packages/autogen-core)	2m 56s
format	1m 0s
lint	50s
pyright (./packages/autogen-core)	55s
pyright (./packages/autogen-magentic-one)	1m 11s
pyright (./packages/agbench)	1m 6s
check-proto-changes-python	1m 10s
test (./packages/autogen-core)	58s
markdown-code-lint	2m 4s
test (./packages/autogen-magentic-one)	1m 46s
test (./packages/autogen-ext)	24m 31s
pyright (./packages/autogen-ext)	1m 1s
test (./packages/autogen-agentchat)	1m 15s
pyright (./packages/autogen-agentchat)	1m 0s
samples-code-check	1m 7s
pyright (./packages/magentic-one-cli)	1m 0s
codecov	0s
	55m 5s

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