ci(conformance): add 2026-07-28 carried-forward leg + bump harness to… #2784

Job	Run time
checks / readme-snippets	11s
checks / pre-commit	41s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 4s
checks / test (3.12, locked, ubuntu-latest)	1m 0s
checks / test (3.11, lowest-direct, windows-latest)	1m 40s
checks / test (3.10, lowest-direct, windows-latest)	1m 34s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 2s
checks / test (3.11, lowest-direct, ubuntu-latest)	58s
checks / test (3.11, locked, windows-latest)	1m 35s
checks / test (3.10, locked, windows-latest)	1m 29s
checks / test (3.13, lowest-direct, windows-latest)	1m 17s
checks / test (3.10, locked, ubuntu-latest)	1m 2s
checks / test (3.12, lowest-direct, windows-latest)	1m 13s
checks / test (3.13, locked, ubuntu-latest)	55s
checks / test (3.14, lowest-direct, windows-latest)	1m 49s
checks / test (3.11, locked, ubuntu-latest)	56s
checks / test (3.13, locked, windows-latest)	1m 19s
checks / test (3.14, lowest-direct, ubuntu-latest)	59s
checks / test (3.13, lowest-direct, ubuntu-latest)	59s
checks / test (3.12, locked, windows-latest)	1m 32s
checks / test (3.14, locked, ubuntu-latest)	2m 2s
checks / test (3.14, locked, windows-latest)	2m 12s
all-green	4s
	27m 33s

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