agent: Add telemetry for eval runs (#28816)

Release Notes:

- N/A

---------

Co-authored-by: Joseph <joseph@zed.dev>

crates/eval/src/ids.rs

@@ -0,0 +1,28 @@
+use anyhow::Result;
+use std::fs;
+use std::path::{Path, PathBuf};
+use uuid::Uuid;
+
+pub fn get_or_create_id(path: &Path) -> Result<String> {
+    if let Ok(id) = fs::read_to_string(path) {
+        let trimmed = id.trim();
+        if !trimmed.is_empty() {
+            return Ok(trimmed.to_string());
+        }
+    }
+    let new_id = Uuid::new_v4().to_string();
+    fs::write(path, &new_id)?;
+    Ok(new_id)
+}
+
+pub fn eval_system_id_path() -> PathBuf {
+    dirs::data_local_dir()
+        .unwrap_or_else(|| PathBuf::from("."))
+        .join("zed-eval-system-id")
+}
+
+pub fn eval_installation_id_path() -> PathBuf {
+    dirs::data_local_dir()
+        .unwrap_or_else(|| PathBuf::from("."))
+        .join("zed-eval-installation-id")
+}