fix(production): preserve emitted plugin runtimes

packages/db/src/generate.ts

@@ -188,6 +188,7 @@ export function generateQueriesFile(
 ): string {
   const byTable = new Map(models.map((m) => [m.model.name, m]));
   const usedModels = new Set<string>();
+  let usesExecResult = false;
   const blocks: string[] = [];
 
   for (const q of queries) {
@@ -202,6 +203,7 @@ export function generateQueriesFile(
     const sig = argFields.length ? `db: Db, args: { ${argFields.join("; ")} }` : "db: Db";
 
     if (q.kind === "exec") {
+      usesExecResult = true;
       blocks.push(
         `export async function ${q.name}(${sig}): Promise<ExecResult> {\n  return db.exec(${sqlLit}, ${positional});\n}`,
       );
@@ -224,7 +226,9 @@ export function generateQueriesFile(
     );
   }
 
-  const imports = [`import type { Db, ExecResult } from "@wrnexus/db";`];
+  const imports = [
+    `import type { Db${usesExecResult ? ", ExecResult" : ""} } from "@wrnexus/db";`,
+  ];
   if (usedModels.size > 0) {
     imports.push(`import { ${[...usedModels].sort().join(", ")} } from "./schema.ts";`);
   }