test: update suites locked to the old direct process.env wiring for the adapter (E00-S04-T04)

tests/health-endpoint.test.mjs

@@ -73,8 +73,8 @@ function assertHealthEndpointSource(src) {
   );
   assert.match(
     src,
-    /3000/,
-    'the server must default to the application port 3000 (Dockerfile EXPOSE / compose :3000)',
+    /server\.listen\(config\.port/,
+    'the server must bind the port from the validated configuration (config.port, E00-S04-T04)',
   );
 }
 
@@ -189,6 +189,19 @@ test('the endpoint reports a healthy application (committed health payload is {"
   );
 });
 
+test('the application port default (3000) lives in the config adapter (E00-S04-T04)', () => {
+  // The server binds `config.port` (asserted above); the port default (3000,
+  // matching the Dockerfile EXPOSE / compose :3000) and the PORT override
+  // live in the config package's environment adapter — the single owner of
+  // process.env reads.
+  const envSrc = read('packages/config/src/env.ts');
+  assert.match(
+    envSrc,
+    /3000/,
+    'the config adapter must default the application port to 3000 (Dockerfile EXPOSE / compose :3000)',
+  );
+});
+
 test('an HTTP smoke test against the booted server succeeds for GET /health (200 + healthy body)', async (t) => {
   if (!tsExecMode()) {
     t.skip(