Bring workflow-discovery into spacedock -- survey front-door to commission

[clkao]

Survey gives brownfield repos a read-only front door from agent history to commission-ready workflow structure.

What changed

• Added the user-invocable survey skill.
• Scoped agentsview sync to this repo Claude history.
• Added scaffold detection and commission hand-off guidance.
• Guarded OPEN decisions against production-shaped rejection data.

Evidence

• 68/68 skills integration tests passed.
• 1201/1201 full and race tests passed.
• Detached audit confirmed the OPEN-first ordering guard.

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[clkao]

4q review result: blocked.

Material: the new survey tests still read skills/survey/SKILL.md outside the 4q quarantine. survey_extraction_test.go and survey_scaffold_test.go extract fenced bash from the instruction file and execute it as code; survey_comparison_test.go is a prose/template grep (markNonAC) over the skill text. Under the new proof policy, behavior must be proven by running real code/fixtures, not by mining prompt/instruction files.

Also move any structural SKILL.md/frontmatter checks into internal/contractlint or replace them with host behavior tests, and drop the unrelated internal/status comment churn. CI remains cancelled per the captain request.