Add parallel write conflict preflight

[snapsynapse]

Summary

• reconcile stale handoffs against GitHub main and current related-repository state
• add opt-in, fail-closed writes preflight for parallel groups using exact files and directory subtrees
• preserve declared operator, agent, and collaborative ownership lanes inside isolated parallel workspaces
• document the shipped AIDR-0008 wrapper release and Homebrew tap discovery PR

Safety contract

• any group that opts in requires a writes list on every member; writes: [] is explicit read-only
• malformed, partial, case/Unicode-aliased, and overlapping declarations refuse before workspace creation or model dispatch
• legacy parallel groups with no declaration retain 0.7 behavior
• first-writer claims are not conflated across physically separate phase workspaces

Verification

• python3 -m pytest -q: 288 passed, 8 skipped
• python3 -m harness.cli eval: 44/44 passed
• python3 -m harness.cli verify-manifest: 9 files verified
• generated docs rebuilt
• git diff --cached --check: clean
• private-name staged-diff scrub: zero matches

Related work

• https://github.com/snapsynapse/harnessie-engine-wrappers/releases/tag/v0.1.0
• Add Harnessie to tap README homebrew-tap#1