perf(regex): eliminate per-call clone overhead in preg_* dispatch

regex::Regex::clone() does not share the underlying meta engine's
search-cache pool, so every fresh clone pays a ~10us warmup cost on
its first use. Two changes together eliminate this across nearly all
preg_* call sites:

- A php_regex! macro resolves PHP-style patterns to a per-call-site
  &'static regex::Regex (via regex-macro's LazyLock), applied at the
  majority of call sites throughout the codebase.
- Call sites still passing dynamic pattern strings go through
  PATTERN_CACHE, which now stores Arc<(Regex, bool)> and hands out
  Arc::clone()s instead of cloning the Regex itself.

PregPattern::resolve() returns a ResolvedPattern enum (Arc or
'static reference) rather than an owned Regex, so neither path ever
clones the Regex proper.

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

1 files changed, 3 insertions, 2 deletions

diff --git a/crates/shirabe/src/command/repository_command.rs b/crates/shirabe/src/command/repository_command.rs
index 06ecfb4f..c42b70c4 100644
--- a/crates/shirabe/src/command/repository_command.rs
+++ b/crates/shirabe/src/command/repository_command.rs
@@ -15,7 +15,8 @@ use shirabe_external_packages::symfony::console::command::command::Command;
 use shirabe_external_packages::symfony::console::input::InputInterface;
 use shirabe_external_packages::symfony::console::output::OutputInterface;
 use shirabe_php_shim::{
-    InvalidArgumentException, PHP_URL_HOST, PhpMixed, RuntimeException, parse_url, strtolower,
+    InvalidArgumentException, PHP_URL_HOST, PhpMixed, RuntimeException, parse_url, php_regex,
+    strtolower,
 };
 
 #[derive(Debug)]
@@ -287,7 +288,7 @@ impl Command for RepositoryCommand {
                     }));
                 }
                 let arg1_str = arg1.as_deref().unwrap();
-                let repo_config: PhpMixed = if Preg::is_match(r"{^\s*\{}", arg1_str) {
+                let repo_config: PhpMixed = if Preg::is_match(php_regex!(r"{^\s*\{}"), arg1_str) {
                     JsonFile::parse_json(Some(arg1_str), None)?
                 } else {
                     if arg2.is_none() {