feat(logging): add AI API path support for image routes

- Included `/v1/images` in AI API path prefixes.
- Introduced tests to validate `/v1/images/generations` and `/v1/images/edits` as AI API paths.

internal/logging/gin_logger_test.go

@@ -58,3 +58,12 @@ func TestGinLogrusRecoveryHandlesRegularPanic(t *testing.T) {
 		t.Fatalf("expected 500, got %d", recorder.Code)
 	}
 }
+
+func TestIsAIAPIPathIncludesImages(t *testing.T) {
+	if !isAIAPIPath("/v1/images/generations") {
+		t.Fatalf("expected /v1/images/generations to be treated as AI API path")
+	}
+	if !isAIAPIPath("/v1/images/edits") {
+		t.Fatalf("expected /v1/images/edits to be treated as AI API path")
+	}
+}