Remove alloc guards and update codegen

Remove unnecessary `alloc` feature guards in `roto-tonic`. Add
`roto-runtime` dependency to `codegen`, fix test data paths, and
include `async-trait` in the hello world build test.

codegen/Cargo.toml

@@ -5,6 +5,7 @@ edition = "2024"
 
 [dependencies]
 
+roto-runtime = { path = "../runtime" }
 roto-tonic = { path = "../roto-tonic" }
 clap = { version = "4", features = ["derive"] }
 log = "0.4"

codegen/src/runtime/mod.rs

@@ -646,7 +646,7 @@ mod tests {
 
     #[test]
     fn test_protoc_binary_compatibility() {
-        let data = include_bytes!("../data/test_data.pb");
+        let data = include_bytes!("../../data/test_data.pb");
         let acc = ProtoAccessor::new(data).unwrap();
 
         // 1. Varints (Integers, Booleans, Enums)

codegen/tests/test_helloworld_build.rs

@@ -34,7 +34,11 @@ fn test_helloworld_generated_code_builds() {
 
     // Create new library project
     let status = Command::new("cargo")
-        .args(["new", "--lib", temp_project_dir.to_str().expect("Invalid path")])
+        .args([
+            "new",
+            "--lib",
+            temp_project_dir.to_str().expect("Invalid path"),
+        ])
         .status()
         .expect("Failed to run cargo new");
     assert!(status.success(), "cargo new failed");
@@ -44,7 +48,7 @@ fn test_helloworld_generated_code_builds() {
     let cargo_toml_content =
         fs::read_to_string(&cargo_toml_path).expect("Failed to read Cargo.toml");
     let updated_cargo_toml = format!(
-        "{}\n\nroto-codegen = {{ path = \"{}\" }}\nroto-runtime = {{ path = \"{}\" }}\nroto-tonic = {{ path = \"{}\" }}\nbytes = \"1.7\"\ntonic = \"0.12\"\ntokio-stream = \"0.1\"\ntower = \"0.4\"\nfutures-util = \"0.3\"\nhttp-body-util = \"0.1\"\nhttp-body = \"1.0\"\n\nhttp = \"1.0\"\n\n[workspace]\n",
+        "{}\n\nroto-codegen = {{ path = \"{}\" }}\nroto-runtime = {{ path = \"{}\" }}\nroto-tonic = {{ path = \"{}\" }}\nbytes = \"1.7\"\ntonic = \"0.12\"\ntokio-stream = \"0.1\"\ntower = \"0.4\"\nfutures-util = \"0.3\"\nhttp-body-util = \"0.1\"\nhttp-body = \"1.0\"\nasync-trait = \"0.1\"\n\nhttp = \"1.0\"\n\n[workspace]\n",
         cargo_toml_content,
         codegen_root.to_string_lossy(),
         project_root.join("runtime").to_string_lossy(),
@@ -55,7 +59,10 @@ fn test_helloworld_generated_code_builds() {
     // 4. Write the generated code to src/lib.rs
     let mut all_code = String::new();
     for (_, content) in generated_files {
-        let replaced = content.replace("use crate::{BufferPool, StatusBody};", "use roto_tonic::{BufferPool, StatusBody};");
+        let replaced = content.replace(
+            "use crate::{BufferPool, StatusBody};",
+            "use roto_tonic::{BufferPool, StatusBody};",
+        );
         all_code.push_str(&replaced);
         all_code.push_str("\n");
     }