Add missing platform entries to subcommands (#2507)

Fixup for #2493

crates/uv/src/commands/pip_install.rs

@@ -193,6 +193,7 @@ pub(crate) async fn pip_install(
         .index_urls(index_locations.index_urls())
         .keyring_provider(keyring_provider)
         .markers(markers)
+        .platform(interpreter.platform())
         .build();
 
     // Resolve the flat indexes from `--find-links`.

crates/uv/src/commands/pip_sync.rs

@@ -127,6 +127,7 @@ pub(crate) async fn pip_sync(
         .index_urls(index_locations.index_urls())
         .keyring_provider(keyring_provider)
         .markers(venv.interpreter().markers())
+        .platform(venv.interpreter().platform())
         .build();
 
     // Resolve the flat indexes from `--find-links`.

crates/uv/src/commands/venv.rs

@@ -152,6 +152,7 @@ async fn venv_impl(
             .keyring_provider(keyring_provider)
             .connectivity(connectivity)
             .markers(interpreter.markers())
+            .platform(interpreter.platform())
             .build();
 
         // Resolve the flat indexes from `--find-links`.