feat(state): pass entity props through describeResources() (#39)

[lex00]

Summary

Closes #39. Extends LexiconPlugin.describeResources() with entities: Map<string, { entityType, props }> so plugins can map cloud-side identifiers back to chant entity names. Solves the round-trip problem identified during #27 where the Temporal lexicon was forced to use server-side keys (namespace/prod) instead of chant entity names.

describeResources?(options: {
  environment: string;
  buildOutput: string;
  entityNames: string[];
  entities: Map<string, { entityType: string; props: Record<string, unknown> }>;  // ← new
}): Promise<Record<string, ResourceMetadata>>

entityNames preserved for the simple case. AWS lexicon (CloudFormation logical IDs == chant entity names) continues unchanged.

Temporal mapping

Server-side identifier	Chant entity match
Namespace prod	Entity with entityType: "Temporal::Namespace" and props.name === "prod"
SearchAttribute prod/Project	Entity with entityType: "Temporal::SearchAttribute" and props.name === "Project" + props.namespace === "prod" (or default-fallback to first declared namespace)
Schedule prod/daily-report	Entity with entityType: "Temporal::Schedule" and props.scheduleId === "daily-report"

Server-side resources without a matching declaration still surface as orphan keys (namespace/<name>, etc.) so chant state diff --live correctly reports them as orphan (in cloud, not declared) rather than forcing a synthetic mapping.

Tests

4 new cases in describe-resources.test.ts:

• Namespace mapping by props.name
• SearchAttribute mapping by props.name + props.namespace
• Schedule mapping by props.scheduleId
• SearchAttribute namespace fallback to first declared

Plus the 5 existing cases updated to pass entities: new Map() (no behavior change since they don't declare entities).

Verification

• just build clean
• npx vitest run → 1639/1639 pass

Test plan

• CI green
• After merge, lays the foundation for describeResources() coverage gap: 9 of 11 lexicons not yet implemented #42 (per-lexicon describeResources rollout)