chore(main): release 6.3.1 #2023

Job	Run time
AdCP storyboard runner — examples/multi_platform_seller (PlatformRouter)	1m 57s
AdCP storyboard runner — v3 reference seller (translator)	2m 43s
Downstream import smoke (representative consumer symbols)	40s
Validate schemas are up-to-date	20m 30s
AdCP storyboard runner — examples/seller_agent.py (@adcp/sdk adcp-3.0)	2m 22s
Validate conventional commit format	15s
AdCP storyboard runner — examples/seller_agent.py (@adcp/sdk adcp-3.1)	2m 52s
Test Python 3.10	6m 11s
Test Python 3.13	6m 13s
AdCP storyboard runner — sales-proposal-mode (proposal_finalize)	1m 36s
Test Python 3.12	7m 0s
Postgres conformance tests (Postgres 16)	1m 27s
Test Python 3.11	7m 1s
v3 reference seller — pytest (respx-mocked upstream)	43s
AdCP storyboard runner — examples/seller_agent.py	3s
	1h 1m 33s

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