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').

package.json

@@ -0,0 +1,28 @@
+{
+  "name": "@arbiter/value-graph",
+  "version": "0.1.0",
+  "description": "Lazy, TTL-cached, version-invalidated store of derived values — the second graph for measures and ARRA value lookups. ARRA (or any value source) registers compute functions; policies read fresh values through measures.",
+  "license": "ISC",
+  "type": "module",
+  "main": "src/index.js",
+  "exports": {
+    ".": "./src/index.js",
+    "./package.json": "./package.json"
+  },
+  "files": [
+    "src/"
+  ],
+  "scripts": {
+    "test": "node --test --test-force-exit \"test/**/*.test.js\"",
+    "test:rigor": "node --test --test-force-exit \"test/value-graph.rigor.test.js\"",
+    "bench": "node bench/hotpath.js"
+  },
+  "dependencies": {
+    "@push-stream-std/push-pushable": "*",
+    "@push-stream-std/push-stream-base": "*",
+    "@rigor/probe": "^0.0.8"
+  },
+  "devDependencies": {
+    "@rigor/core": "^3.1.2"
+  }
+}