fix(memory): install the memtrack copy before any run under sudo

Walltime runs samply under sudo with the user's HOME, so it creates
`~/.cache` as root when it does not exist yet. A later memory run then
fails to create `~/.cache/codspeed/memtrack/<hash>` and cannot grant the
eBPF capabilities. Install the copy upfront, as the current user, when
the memory mode is requested.

Refs COD-3440
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: 2 people

src/executor/orchestrator.rs

@@ -125,6 +125,15 @@ impl Orchestrator {
         let mut all_completed_runs = vec![];
 
         if !self.config.skip_run {
+            // Install memtrack's copy before any run under sudo, which may create
+            // a root-owned `~/.cache` (e.g. samply's symbol cache in walltime).
+            #[cfg(target_os = "linux")]
+            if modes.contains(&RunnerMode::Memory) {
+                if let Err(e) = super::memtrack_path() {
+                    debug!("Failed to install memtrack: {e:#}");
+                }
+            }
+
             start_opened_group!("Running the benchmarks");
         }