Add self-driving CRM agent reference loops

[snbafana]

Summary

• define one minimal agent contract: select, resolve, load all memories, gather evidence, decide, mutate, audit
• add concrete relationship-radar, pre-meeting-brief, enrichment/reconciliation, and X-mutual workflows
• keep transient recommendations out of durable memories and make no_change a successful outcome
• add evals for autonomous relationship triage and generation-correct X mutual analysis

Architecture

This extends the existing Cued skill and memory owner. It adds no scheduler, daemon, policy registry, agent runtime, or second CRM database: agents supply policy over Cued SQLite state and audited CLI mutations.

Stack

This PR is intentionally based on #73 because the workflows rely on exhaustive memory reads and explicit invalidation. The X workflow describes the archive-generation contract implemented in #75 and becomes executable after that PR lands.

Verification

• jq empty skills/cued/evals/evals.json
• pnpm exec vitest run src/skills/install.test.ts
• pnpm check:biome
• git diff --check