Fix ObsoleteNode flakiness in multi-substring search feature spec

Wrap each search+assertion group in retry_block to handle Angular
DOM re-renders that cause stale node references in Capybara/Cuprite.

https://claude.ai/code/session_01WBou6gxZVaywfpnNexokp7

Author: claude

spec/features/projects/project_autocomplete_spec.rb

@@ -196,21 +196,29 @@
     end
 
     # Both terms present anywhere in the name
-    top_menu.search "big fish"
-    top_menu.expect_result "The big beautiful fish"
-    top_menu.expect_no_result "Plain project"
+    retry_block do
+      top_menu.search "big fish"
+      top_menu.expect_result "The big beautiful fish"
+      top_menu.expect_no_result "Plain project"
+    end
 
     # Partial word as the second term
-    top_menu.search "big fi"
-    top_menu.expect_result "The big beautiful fish"
+    retry_block do
+      top_menu.search "big fi"
+      top_menu.expect_result "The big beautiful fish"
+    end
 
     # Terms in reverse order still match
-    top_menu.search "fish big"
-    top_menu.expect_result "The big beautiful fish"
+    retry_block do
+      top_menu.search "fish big"
+      top_menu.expect_result "The big beautiful fish"
+    end
 
     # One term that does not appear → no match
-    top_menu.search "big xyz"
-    top_menu.expect_no_result "The big beautiful fish"
+    retry_block do
+      top_menu.search "big xyz"
+      top_menu.expect_no_result "The big beautiful fish"
+    end
   end
 
   it "displays workspace type badges for portfolios and programs",