refactor(async): migrate from blocking HTTP to async/await with tokio

Replace reqwest::blocking with async reqwest across the entire codebase.
All command execute functions, registry API calls (packagist, downloader,
resolver, lockfile), and the main entry point now use async/await with
the tokio runtime. The pubgrub resolver runs on spawn_blocking since its
DependencyProvider trait is synchronous, using Handle::block_on for
async I/O within that context.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/crates/mozart/src/commands/install.rs b/crates/mozart/src/commands/install.rs
index 1094d99..d55ba72 100644
--- a/crates/mozart/src/commands/install.rs
+++ b/crates/mozart/src/commands/install.rs
@@ -310,7 +310,7 @@ fn make_progress(show: bool, pkg_name: &str, version: &str) -> downloader::Downl
 /// 7. Writes vendor/composer/installed.json
 /// 8. Cleans up empty vendor directories
 /// 9. Generates the autoloader (unless no_autoloader)
-pub fn install_from_lock(
+pub async fn install_from_lock(
     lock: &lockfile::LockFile,
     working_dir: &Path,
     vendor_dir: &Path,
@@ -418,7 +418,8 @@ pub fn install_from_lock(
                 &pkg.name,
                 Some(&mut progress),
                 None,
-            )?;
+            )
+            .await?;
 
             progress.finish();
         }
@@ -496,7 +497,7 @@ pub fn install_from_lock(
     Ok(())
 }
 
-pub fn execute(
+pub async fn execute(
     args: &InstallArgs,
     cli: &super::Cli,
     console: &mozart_core::console::Console,
@@ -590,6 +591,7 @@ pub fn execute(
             apcu_autoloader_prefix: args.apcu_autoloader_prefix.clone(),
         },
     )
+    .await
 }
 
 #[cfg(test)]