refactor(preg): back PregMatches with regex::Captures

PregMatches was an IndexMap of owned Strings copied out of the match, so
every preg_match2/preg_replace_callback call allocated a String per
capture group (twice over for a named group) whether or not the caller
read it. It now wraps the regex::Captures itself, held alongside the
pattern it came from so groups stay reachable by both their named and
their numbered form, and hands out &str borrowed from the subject. The
subject's lifetime becomes a parameter of the type.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/crates/shirabe-symfony-process/src/process.rs b/crates/shirabe-symfony-process/src/process.rs
index 96853e90..0f7d3814 100644
--- a/crates/shirabe-symfony-process/src/process.rs
+++ b/crates/shirabe-symfony-process/src/process.rs
@@ -939,8 +939,11 @@ impl Process {
             ) | [^"]*+ )"/x"#
             ),
             |m: &PregMatches| -> anyhow::Result<String> {
-                let m0 = m[&CaptureKey::ByIndex(0)].clone().unwrap_or_default();
-                let m1 = m.get(&CaptureKey::ByIndex(1)).cloned().flatten();
+                let m0 = m
+                    .get(&CaptureKey::ByIndex(0))
+                    .unwrap_or_default()
+                    .to_string();
+                let m1 = m.get(&CaptureKey::ByIndex(1)).map(str::to_string);
                 if m1.is_none() {
                     return Ok(m0);
                 }
@@ -1071,9 +1074,8 @@ impl Process {
             |matches: &PregMatches| -> anyhow::Result<String> {
                 let key = matches
                     .get(&CaptureKey::ByIndex(1))
-                    .cloned()
-                    .flatten()
-                    .unwrap_or_default();
+                    .unwrap_or_default()
+                    .to_string();
                 match env.get(&key) {
                     None => Err(InvalidArgumentException::new(format!(
                         "Command line is missing a value for parameter \"{}\": {}",