docs(adr): record Horizon A architecture decisions 0002–0015

[neomatrix369]

Summary

• Record formal ADRs 0002–0015 under docs/adr/ (Horizon A topology Accepted)
• Reserve number 0001 without publishing it while that packaging draft stays under review
• Wire indexes from Architecture, STATUS, README, QUICKSTART, CONTRIBUTING, plan README, and CHANGELOG
• Fix markdownlint false positive on ADR-0007 line wrap

nWave reviewers (solution-architect + documentarist): APPROVED on the Accepted set — zero blocking issues.

Test Results

Stack	Result	Coverage
Python (sandbox/tests)	128 passed	96.2% (fail_under 95)
CLI (cli test:coverage)	55 passed	Lines/stmts 98.6%, funcs 100%, branches 85.71% (gate 85)
Live ACL (prototypes/dc-dashboard test:coverage)	52 passed, 1 skipped	Lines/stmts 98.38%, funcs 96.15%, branches 86.04%

Quality Gates

./scripts/quality-gates.sh --quick — T1 passed (markdownlint, ruff, mypy, bandit, xenon, vulture, gitleaks)

Checklist

• ./scripts/quality-gates.sh passes locally
• New tests added or updated (or change is docs-only)
• Docs updated where applicable
• No secrets or credentials committed

Test plan

• Spot-check docs/adr/README.md lists 0002–0015 only (0001 reserved, not linked)
• Confirm no broken links to 0001-monk-*.md
• Confirm STATUS has no PROPOSED Monk ADR pointer
• Reviewer skim of Accepted catalog

[github-actions]

code-review-graph review

Overall risk: 0.00 (LOW) — 0 changed function(s)/class(es), 0 affected flow(s), 0 test gap(s)

Token savings: this graph-backed report used ~23,462 fewer tokens (~100%) than reading every changed file in full (estimated, chars/4 approximation).

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[neomatrix369]

ADR-0001 will land into the catalog via PR #63 soon