Bounded WEB HTTP conveyor with replay-safe streaming downlink added

Co-Authored-By: brekotis <93345790+brekotis@users.noreply.github.com>

src/web/bridge/behavior_tests.rs

@@ -0,0 +1,26 @@
+use std::io::Write;
+use std::process::{Command, Stdio};
+
+/// Exercises the actual generated page with deterministic network and native-boundary doubles.
+pub(super) fn run(page: &super::BridgePage) {
+    let mut child = Command::new("node")
+        .args(["-e", include_str!("behavior_tests.js"), "--", "--stdin"])
+        .stdin(Stdio::piped())
+        .stdout(Stdio::piped())
+        .stderr(Stdio::piped())
+        .spawn()
+        .expect("Node.js 22+ is required for executable WEB bridge regressions");
+    child
+        .stdin
+        .take()
+        .unwrap()
+        .write_all(page.body.as_bytes())
+        .unwrap();
+    let output = child.wait_with_output().unwrap();
+    assert!(
+        output.status.success(),
+        "bridge regressions failed:\n{}\n{}",
+        String::from_utf8_lossy(&output.stdout),
+        String::from_utf8_lossy(&output.stderr)
+    );
+}