feat: wrap route handlers with tracing at build time

src/build/virtual/tracing.ts

@@ -12,8 +12,15 @@ export default function tracing(nitro: Nitro) {
         imports.push(`import { tracingPlugin as srvxTracing } from "srvx/tracing";`);
       }
       if (h3) {
-        imports.push(`import { tracingPlugin as h3Tracing } from "h3/tracing";`);
+        imports.push(
+          `import { tracingPlugin as h3Tracing, wrapFindRouteWithTracing } from "h3/tracing";`
+        );
         setup.push(`  h3Tracing()(nitroApp.h3);`);
+        setup.push(`  if (nitroApp.h3["~findRoute"]) {`);
+        setup.push(
+          `    nitroApp.h3["~findRoute"] = wrapFindRouteWithTracing(nitroApp.h3["~findRoute"]);`
+        );
+        setup.push(`  }`);
       }
 
       return [