Add basic decoding for v0.4 msgpack traces

.github/workflows/fuzz.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        directory: [alloc, profiling, ddcommon-ffi]
+        directory: [alloc, profiling, ddcommon-ffi, trace-utils]
     env:
       CARGO_TERM_COLOR: always
     steps:

trace-utils/Cargo.toml

@@ -39,6 +39,8 @@ testcontainers = { version = "0.17.0", optional = true }
 cargo_metadata = { version = "0.18.1", optional = true }
 
 [dev-dependencies]
+bolero = "0.10.1"
+bolero-generator = "0.10.2"
 criterion = "0.5.1"
 httpmock = { version = "0.7.0"}
 serde_json = "1.0"

trace-utils/src/lib.rs

@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0
 
 pub mod config_utils;
+pub mod msgpack_decoder;
 pub mod send_data;
 pub mod stats_utils;
 #[cfg(any(test, feature = "test-utils"))]

trace-utils/src/msgpack_decoder/mod.rs

@@ -0,0 +1,4 @@
+// Copyright 2024-Present Datadog, Inc. https://www.datadoghq.com/
+// SPDX-License-Identifier: Apache-2.0
+
+pub mod v04;