chore: Fix several style lints (#17488)

It's not comprehensive enough to start linting on `style` group, but
hey, it's a start.

Release Notes:

- N/A

crates/client/src/telemetry.rs

@@ -670,6 +670,24 @@ 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 mut summer = Sha256::new();
+    summer.update(checksum_seed);
+    summer.update(json);
+    summer.update(checksum_seed);
+    let mut checksum = String::new();
+    for byte in summer.finalize().as_slice() {
+        use std::fmt::Write;
+        write!(&mut checksum, "{:02x}", byte).unwrap();
+    }
+
+    Some(checksum)
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -828,21 +846,3 @@ mod tests {
             && telemetry.state.lock().first_event_date_time.is_none()
     }
 }
-
-pub fn calculate_json_checksum(json: &impl AsRef<[u8]>) -> Option<String> {
-    let Some(checksum_seed) = &*ZED_CLIENT_CHECKSUM_SEED else {
-        return None;
-    };
-
-    let mut summer = Sha256::new();
-    summer.update(checksum_seed);
-    summer.update(&json);
-    summer.update(checksum_seed);
-    let mut checksum = String::new();
-    for byte in summer.finalize().as_slice() {
-        use std::fmt::Write;
-        write!(&mut checksum, "{:02x}", byte).unwrap();
-    }
-
-    Some(checksum)
-}