docs(work): scaffold docs-and-runbook-v1 epic + stories

docs/work/docs-and-runbook-v1/02-doc-sweep/_story.md

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+---
+id: 02-doc-sweep
+epic: docs-and-runbook-v1
+title: README + CLAUDE.md + .env.example sweep
+type: technical-story
+status: todo
+feature: docs
+depends-on: [01-runbook]
+blocks: []
+---
+
+## Tasks
+
+- [ ] Update README.md to point at runbook + reflect 5 gates
+- [ ] Expand .env.example to cover all relevant env vars with comments
+- [ ] Sweep CLAUDE.md "Quick Start" for new commands (pnpm work, pnpm fallow, pnpm fallow:audit)
+- [ ] Add a "Conformance gates" reference line to docs/guides/conformance-quickref.md noting Fallow is the 5th
+- [ ] Final verification + closeout