fix: reduce noisy missing static resource logs from error to warn

Agent-Logs-Url: https://github.com/conorheffron/ironoc/sessions/f3624572-d35f-48a1-96fe-8153c30c577f

Co-authored-by: conorheffron <8218626+conorheffron@users.noreply.github.com>

Author: Copilot

src/main/java/net/ironoc/portfolio/resolver/PushStateResourceResolver.java

@@ -60,7 +60,7 @@ private Resource resolve(String requestPath, List<? extends Resource> locations)
             if (staticResource.isPresent()) {
                 return staticResource.get();
             } else {
-                error("The request path {} does not exist.", requestPath);
+                warn("The request path {} does not exist.", requestPath);
                 return null;
             }
         }

src/test/java/net/ironoc/portfolio/resolver/PushStateResourceResolverTest.java

@@ -16,6 +16,8 @@
 import static org.hamcrest.Matchers.notNullValue;
 import static org.hamcrest.Matchers.nullValue;
 import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
@@ -117,4 +119,22 @@ public void test_resolveUrlPath_api_ignoredPath_success() {
         // then
         assertThat(result, is(nullValue()));
     }
+
+    @Test
+    public void test_resolveResource_missingHandledPath_warns_notErrors() throws IOException {
+        // given
+        PushStateResourceResolver pushStateResourceResolverSpy =
+                spy(new PushStateResourceResolver(handledExtensions, ignorePaths));
+        when(resourceMock.createRelative(anyString())).thenReturn(resourceMock);
+        when(resourceMock.exists()).thenReturn(false);
+
+        // when
+        Resource result = pushStateResourceResolverSpy.resolveResource(httpServletRequestMock,
+                "home.js", List.of(resourceMock), resourceResolverChainMock);
+
+        // then
+        assertThat(result, is(nullValue()));
+        verify(pushStateResourceResolverSpy).warn("The request path {} does not exist.", "home.js");
+        verify(pushStateResourceResolverSpy, never()).error("The request path {} does not exist.", "home.js");
+    }
 }