fix: add --all to cargo fmt in script/test and autoformat codebase

cargo fmt without --all fails with "Failed to find targets" in
workspace repos. This was blocking every story's gates. Also ran
cargo fmt --all to fix all existing formatting issues.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/src/agents/merge.rs

@@ -248,7 +248,9 @@ pub(crate) fn run_squash_merge(
             .output()
             .map_err(|e| format!("Failed to check merge diff: {e}"))?;
         let changed_files = String::from_utf8_lossy(&diff_check.stdout);
-        let has_code_changes = changed_files.lines().any(|f| !f.starts_with(".huskies/work/"));
+        let has_code_changes = changed_files
+            .lines()
+            .any(|f| !f.starts_with(".huskies/work/"));
         if !has_code_changes {
             all_output.push_str(
                 "=== Merge commit contains only .huskies/ file moves, no code changes ===\n",
@@ -423,7 +425,14 @@ pub(crate) fn run_squash_merge(
     // Exclude .huskies/work/ (pipeline file moves) but keep .huskies/project.toml
     // and other config files which are legitimate deliverables.
     let diff_stat = Command::new("git")
-        .args(["diff", "--stat", "HEAD~1..HEAD", "--", ".", ":(exclude).huskies/work"])
+        .args([
+            "diff",
+            "--stat",
+            "HEAD~1..HEAD",
+            "--",
+            ".",
+            ":(exclude).huskies/work",
+        ])
         .current_dir(project_root)
         .output()
         .map(|o| String::from_utf8_lossy(&o.stdout).trim().to_string())