fix(repository): run lazy initialization in count/has_package

PHP's ArrayRepository::count()/hasPackage() call $this->initialize(),
which late-binds to the concrete repository class and lazily loads its
packages. The Rust pass-throughs skipped that: they ran ArrayRepository's
stub initialize instead, returning 0/false and marking the repository
initialized with an empty package list, which made ensure_initialized()
skip the real initialization forever after.

Take &mut self in RepositoryInterface::count/has_package so the lazy
repositories (Filesystem, Platform, Composer) can guard with their real
initialize, and return Result from has_package since that initialization
can fail (PHP propagates the exception). InstallerInterface::is_installed
and InstallationManager::is_package_installed/mark_alias_installed
propagate the same way, which also resolves the TODO(phase-d) markers on
Package/Path/Artifact/Vcs repositories about initialization errors being
swallowed.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/crates/shirabe/src/repository/handle.rs b/crates/shirabe/src/repository/handle.rs
index f093f66b..497e2b91 100644
--- a/crates/shirabe/src/repository/handle.rs
+++ b/crates/shirabe/src/repository/handle.rs
@@ -84,7 +84,7 @@ impl RepositoryInterfaceHandle {
     }
 
     pub fn count(&self) -> anyhow::Result<usize> {
-        self.0.borrow().count()
+        self.0.borrow_mut().count()
     }
 
     pub fn get_repo_name(&self) -> String {
@@ -95,8 +95,8 @@ impl RepositoryInterfaceHandle {
         self.0.borrow_mut().get_packages()
     }
 
-    pub fn has_package(&self, package: PackageInterfaceHandle) -> bool {
-        self.0.borrow().has_package(package)
+    pub fn has_package(&self, package: PackageInterfaceHandle) -> anyhow::Result<bool> {
+        self.0.borrow_mut().has_package(package)
     }
 
     pub fn find_package(