client: Store ReleaseChannel instead of &'static str (#47868)

Closes #ISSUE

Store `ReleaseChannel` instead of `&'static str`. This allows displaying
other aspects about the channel than just the display name. Makes it
more concrete what is stored within the field, as it has limited
variants, as opposed to something like `session_id`

Release Notes:

- N/A *or* Added/Fixed/Improved ...

crates/client/src/telemetry.rs

@@ -49,7 +49,7 @@ struct TelemetryState {
     installation_id: Option<Arc<str>>, // Per app installation (different for dev, nightly, preview, and stable)
     session_id: Option<String>,        // Per app launch
     metrics_id: Option<Arc<str>>,      // Per logged-in user
-    release_channel: Option<&'static str>,
+    release_channel: Option<ReleaseChannel>,
     architecture: &'static str,
     events_queue: Vec<EventWrapper>,
     flush_events_task: Option<Task<()>>,
@@ -191,13 +191,10 @@ impl Telemetry {
         client: Arc<HttpClientWithUrl>,
         cx: &mut App,
     ) -> Arc<Self> {
-        let release_channel =
-            ReleaseChannel::try_global(cx).map(|release_channel| release_channel.display_name());
-
         let state = Arc::new(Mutex::new(TelemetryState {
             settings: *TelemetrySettings::get_global(cx),
             architecture: env::consts::ARCH,
-            release_channel,
+            release_channel: ReleaseChannel::try_global(cx),
             system_id: None,
             installation_id: None,
             session_id: None,
@@ -490,16 +487,12 @@ impl Telemetry {
                 continue;
             };
 
-            let project_type = if file_name == "pnpm-lock.yaml" {
-                Some("pnpm")
-            } else if file_name == "yarn.lock" {
-                Some("yarn")
-            } else if file_name == "package.json" {
-                Some("node")
-            } else if DOTNET_PROJECT_FILES_REGEX.is_match(file_name) {
-                Some("dotnet")
-            } else {
-                None
+            let project_type = match file_name {
+                "pnpm-lock.yaml" => Some("pnpm"),
+                "yarn.lock" => Some("yarn"),
+                "package.json" => Some("node"),
+                _ if DOTNET_PROJECT_FILES_REGEX.is_match(file_name) => Some("dotnet"),
+                _ => None,
             };
 
             if let Some(project_type) = project_type {
@@ -646,7 +639,9 @@ impl Telemetry {
                     os_version: state.os_version.clone(),
                     architecture: state.architecture.to_string(),
 
-                    release_channel: state.release_channel.map(Into::into),
+                    release_channel: state
+                        .release_channel
+                        .map(|channel| channel.display_name().to_owned()),
                     events,
                 },
             )
@@ -670,9 +665,7 @@ impl Telemetry {
 }
 
 pub fn calculate_json_checksum(json: &impl AsRef<[u8]>) -> Option<String> {
-    let Some(checksum_seed) = &*ZED_CLIENT_CHECKSUM_SEED else {
-        return None;
-    };
+    let checksum_seed = ZED_CLIENT_CHECKSUM_SEED.as_ref()?;
 
     let mut summer = Sha256::new();
     summer.update(checksum_seed);