feat(javascript): compare static endpoints with HAR captures (#9090)

* feat(javascript): compare static endpoints with HAR captures

* test(javascript): preserve original HAR fixture bytes during formatting

* test(javascript): load the byte-preserved HAR fixture

src/contracts/javascript/staticObservedEndpointExample.ts

@@ -0,0 +1,32 @@
+import { createEvidence } from "../../domain/evidence.js";
+import { JAVASCRIPT_APPLICATION_EVIDENCE_EXAMPLE } from "./javascriptRuntimeReconciliationExample.js";
+
+/** Portable source records demonstrate admission, without claiming a real capture. */
+export const STATIC_OBSERVED_ENDPOINT_COMPARISON_EXAMPLE = {
+  application: JAVASCRIPT_APPLICATION_EVIDENCE_EXAMPLE,
+  capture: createEvidence(
+    undefined,
+    { id: "rea-example-har", name: "Example HAR", version: "1" },
+    {
+      operation: "inspect_web_network_capture",
+      parameters: { sensitive_value_count: 0 },
+      result: {
+        artifact: { path: "/capture.har", sha256: null, bytes: 0 },
+        format: "har",
+        decoder: { id: "rea-example-har", name: "Example HAR", version: "1" },
+        container: {
+          reported: {},
+          numeric_literals: [],
+          redactions: [],
+          records_pointer: "/log/entries",
+        },
+        total_records: 0,
+        records: [],
+        runtime_attribution: "unknown",
+        limitations: ["Empty illustrative capture, not a runtime measurement."],
+      },
+      confidence: "observed",
+    },
+  ),
+  origin: "https://example.test",
+};