Name the story that owns the declared script-audit gap

[ivanopcode]

Rework from the TASK-260824-31y75t review verdict, item 1.

tests/test_schema8_candidate_conformance.py declared the missing
script-command audit warning classes as owned by STORY-260822-27ze8z
(module-roots-implementation). That story scopes manifest module-roots
parsing, bijection validation, containment and diagnostics — it has no
audit-label surface — and it closes with the task that added this consumer.
The real owner is STORY-260822-2evh3p (script-worker-v1-implementation),
whose scope explicitly includes declared-only audit labeling for legacy schemas.

The classification reason strings were the one part of this mechanism no test
read: test_script_policy_sections_are_all_classified checked the section key
set in both directions but never the reasons, so a gap could rot into an orphan
without a lane noticing. That test now also asserts every declared gap names an
owning story, and the candidate-cases.tsv row for it says so.

Verification

Run against the exact candidate identity this task qualifies —
6001dc33281b94a4ec7442ab15278550dd0f51d9, manifest sha256
803918bf8672f76cf990985e51db213b826674cd5bb54fbf47731b8404b44403.

check	exit	result
candidate consumer (CSK_REQUIRE_FULL_CANDIDATE_ROOT=1)	0	183 passed
candidate_consumption.py require	0	every declared artifact published
candidate_consumption.py gate --platform darwin	0	11 declared cases observed passing across 183 results
ordinary suite	0	1797 passed, 245 skipped
python -m mypy	0	75 source files clean
actionlint	0	clean
tests/test_candidate_consumption.py + tests/test_ci_workflow.py	0	41 passed

Negative controls, all red, rebuilt from the real candidate root on this tree:

mode	family	require	pytest	gate
A — dropped from manifest and disk	schema-cases/agent-skill-v8	1	2	1
A	schema-cases/csk-skill-v8	1	2	1
A	schema-cases/install-marker-v4	1	2	1
A	vectors/module-roots.json	1	2	1
A	vectors/script-host-execution-policy.json	1	2	1
B — published but generating no cases	agent-skill-v8	0	1	1
B	csk-skill-v8	0	1	1
B	install-marker-v4	0	1	1

Plus one control for the new assertion: stripping the owner from the declared
gap fails test_script_policy_sections_are_all_classified by name (exit 1).