chore(deps): bump litellm from 1.81.14 to 1.83.0 in /apps/agentstack-sdk-py #456

Job	Run time
mise setup	49s
mise agentstack-sdk-py:test-all --python=3.14	1m 27s
mise test	1m 2s
mise microshift-vm:build:qemu	8s
mise agentstack-sdk-py:test-all --python=3.11	1m 12s
mise check	1m 5s
mise agentstack-server:test:e2e	13m 0s
mise agentstack-server:test:e2e-examples	0s
mise agentstack-server:test:integration	0s
	18m 43s

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