docs: rewrite root README for org operators

[seonghobae]

Rewrite the root README for the org operator and sibling-repo maintainers. This repository is the ContextualWisdomLab org profile source and the central required-workflow source. It runs alone. Siblings consume it by inheriting organization ruleset 18156473 (CWL Central required workflows); they do not copy workflow files.

What changed

• README.md is now the buyer/operator story: what this repo is, where the public profile lives (profile/README.md), current ruleset status, how to run this repo alone, and how a sibling consumes the central workflows (MSA 따로 또 같이).
• docs/pr-review-and-merge-procedure.md keeps the previous bot/agent operational truth (exact-head CI, successor heads, do-not-merge / DIRTY–CONFLICTING repair, writer boundaries, approve-gate, OpenCode/Strix scheduler details). Nothing in that contract was deleted.
• Pointers in PR_GOVERNANCE_AUDIT.md, CLAUDE.md, and ARCHITECTURE.md now send agents to the procedure doc instead of treating the root README as the review manual.
• CI fix: scripts/ci/test_strix_quick_gate.sh now asserts those procedure strings in docs/pr-review-and-merge-procedure.md and keeps a README pointer. That was the failing Strix Changed Path Quality CI / exact-head-path-policy check.

Naruon remains the composition hub that can receive other CWL products. This README does not treat that as a bug, and this control plane still documents an independent run without naruon.

Existing APA 7th DIKW citations stay in profile/README.md. No new citations were invented.

Verification

• pytest tests/test_pr_governance_audit_contract.py tests/test_central_required_workflow_ruleset_audit.py — 18 passed
• Retargeted Strix prose needles verified present in the procedure doc and README pointer

Test plan

• Confirm the root README reads as an operator/sibling-maintainer guide, not a bot review manual
• Confirm docs/pr-review-and-merge-procedure.md still contains exact-head, successor-head, DIRTY/CONFLICTING, writer-boundary, and approve-gate procedure
• Confirm a sibling maintainer can see that they inherit ruleset 18156473 and must not copy Strix/OpenCode/Noema/scheduler files
• Confirm Strix Changed Path Quality CI / exact-head-path-policy is green on this head

  

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