value-graph 0.1.0: JSON-free, bigint-free binary snapshot layer

- src/snapshot.js: compact portable wire (VGST store / VGGP graph), binary maps for
  params/pattern/objects (no JSON), buffer values (no JS bigint), CRC-32 guarded.
- createFileStore: binary per-key files (encodeEntryBytes/decodeEntryBytes).
- ValueGraph snapshot/snapshotFile/restore/loadFile; keys base64url(params-bytes).
- 60 tests (node:test + rigor incl. 'flip ANY byte never decodes silently').

.npmrc

@@ -0,0 +1,6 @@
+@push-stream-std:registry=https://hub.kl1.tenere.ai/api/packages/push-stream-std/npm/
+//hub.kl1.tenere.ai/api/packages/push-stream-std/npm/:_authToken=${PACKAGE_TOKEN}
+@arbiter:registry=https://hub.kl1.tenere.ai/api/packages/Arbiter/npm/
+//hub.kl1.tenere.ai/api/packages/Arbiter/npm/:_authToken=${PACKAGE_TOKEN}
+@rigor:registry=https://hub.kl1.tenere.ai/api/packages/Rigor/npm/
+//hub.kl1.tenere.ai/api/packages/Rigor/npm/:_authToken=${PACKAGE_TOKEN}