feat(repository-utils): recurse into transitive dependencies

Implement the self-recursion in filterRequiredPackages so that
packages required transitively are collected, matching the PHP
source. BasePackageHandle is a type alias for PackageInterfaceHandle,
so no cast is needed.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/crates/shirabe/src/repository/repository_utils.rs b/crates/shirabe/src/repository/repository_utils.rs
index 4522039..38c5016 100644
--- a/crates/shirabe/src/repository/repository_utils.rs
+++ b/crates/shirabe/src/repository/repository_utils.rs
@@ -27,8 +27,12 @@ impl RepositoryUtils {
                     let already_in_bucket = bucket.iter().any(|b| b.ptr_eq(candidate));
                     if !already_in_bucket {
                         bucket.push(candidate.clone());
-                        // TODO(phase-b): recursion requires &dyn PackageInterface; cast pending.
-                        let _ = (requires.contains_key("dummy"),);
+                        bucket = Self::filter_required_packages(
+                            packages,
+                            candidate.clone(),
+                            false,
+                            bucket,
+                        );
                     }
                     break;
                 }