feat(namespace): aggregation reads under the law + epoch 3 (the key-split rebuild) + THE ARMING COMMIT — the capability constant, the law module, and the typed refusals export from the package root; both engines' conformance suites light on this signal

src/index.ts

@@ -106,6 +106,25 @@ export type {
 // Export Aggregation Engine
 export { AggregationIndex, AggregateMaterializer, bucketTimestamp, parseBucketRange } from './aggregation/index.js'
 
+// THE ONE FIELD-ADDRESSING LAW (sealed 2026-08-03) — the arming surface both
+// engines' conformance suites detect: bare names = user metadata, system.* =
+// the ten ruled scalars, plumbing invisible, refusals typed with the fix in
+// the message. See docs/concepts/field-addressing.md.
+export {
+  FIELD_ADDRESSING_CAPABILITY,
+  SYSTEM_ENTITY_SCALARS,
+  SYSTEM_RELATION_SCALARS,
+  PLUMBING_FIELDS,
+  parseFieldAddress,
+  readEntityFieldAddress,
+  readRelationFieldAddress,
+  buildUnresolvableMessage,
+  InvalidFieldAddressError,
+  UnresolvableFieldError,
+  UnsupportedFindOptionError
+} from './db/fieldAddressing.js'
+export type { FieldAddress, FieldAddressKind } from './db/fieldAddressing.js'
+
 // Export Neural Import (AI data understanding)
 export { NeuralImport } from './neural/neuralImport.js'
 export type {