Fix crate isolation build issues (#6362)

* [x] I know how to trick the checkbox CI

crates/re_log_types/src/lib.rs

@@ -371,7 +371,7 @@ pub struct StoreInfo {
     ///
     // NOTE: The version comes directly from the decoded RRD stream's header, duplicating it here
     // would probably only lead to more issues down the line.
-    #[serde(skip)]
+    #[cfg_attr(feature = "serde", serde(skip))]
     pub store_version: Option<CrateVersion>,
 }
 

crates/re_viewer/src/app.rs

@@ -983,6 +983,7 @@ impl App {
                             format!("Data source {} has left unexpectedly: {err}", msg.source);
 
                         #[cfg(not(target_arch = "wasm32"))]
+                        #[cfg(feature = "server")]
                         if err
                             .downcast_ref::<re_sdk_comms::ConnectionError>()
                             .is_some_and(|e| {

rerun_py/build.rs

@@ -9,6 +9,7 @@ fn main() {
         && !re_build_tools::is_tracked_env_var_set("RERUN_ALLOW_MISSING_BIN")
     {
         #[cfg(target_os = "windows")]
+        #[allow(clippy::unwrap_used)]
         let rerun_bin = std::env::current_dir()
             .unwrap()
             .join("rerun_sdk/rerun_cli/rerun.exe");