docs: standards cleanup — single front-door CONTRACTS.md + archive stale plan artifacts

Establish CONTRACTS.md at the EVOLV root as the canonical map of where every
contract, rule, and standard lives. Surface it from CLAUDE.md so every fresh
agent or colleague lands there first.

Reshape .claude/refactor/ to reflect that the platform refactor is done:
live standards stay at the top level; the plan artifacts (CONTINUE_HERE.md,
TASKS.md) move into Archive/ with WARNING banners.

Drop content that drifted out of date or duplicated the new standards stack:
- docs/DEVELOPER_GUIDE.md (pre-refactor walkthrough; superseded by
  wiki/Architecture, wiki/Getting-Started, .claude/rules/node-architecture,
  .claude/refactor/MODULE_SPLIT + per-node CONTRACT.md + src/commands/).
- .agents/decisions/ (15 DECISION files): load-bearing decisions belong in
  commit messages and PR descriptions; live open items in OPEN_QUESTIONS.md.
- .agents/improvements/TOP10_*.md: moved to Archive/.

Bump generalFunctions to 49c77f2 — adds CONTRACT.md inside the library:
different shape from per-node CONTRACT.md files (library API, not msg.topic),
with stability tags and pointers to .claude/refactor/CONTRACTS.md §N.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.claude/agents/evolv-orchestrator.md

@@ -41,13 +41,16 @@ You are the EVOLV orchestrator agent. You decompose complex tasks, route to spec
    - InfluxDB retention/backfill semantics or dashboard query contracts
 
 ## Reference Files
+- `CONTRACTS.md` (EVOLV root) — front-door map: where every contract, rule, and standard lives
+- `.claude/refactor/CONTRACTS.md` — platform API shapes (BaseDomain, BaseNodeAdapter, commands registry, …)
+- `.claude/refactor/OPEN_QUESTIONS.md` — live decisions log
 - `.agents/skills/evolv-orchestrator/SKILL.md` — Full orchestration protocol
-- `.agents/AGENTS.md` — Agent invocation policy, routing table, decision governance
-- `.agents/decisions/` — Decision log directory
+- `.agents/AGENTS.md` — Agent invocation policy and routing table
 - `.agents/improvements/IMPROVEMENTS_BACKLOG.md` — Deferred improvements
 
 ## Decision Governance
-- Record decision-gate outcomes in `.agents/decisions/DECISION-YYYYMMDD-<slug>.md`
+- Capture load-bearing decisions in the commit message and PR description
+- Live open questions belong in `.claude/refactor/OPEN_QUESTIONS.md`
 - Ask at most 3 questions per interview batch
 - Owner-approved defaults: compatibility=controlled, safety=availability-first