Fix silent exit when a query runs on a connection left idle by a prompt

An idle Bun.SQL connection does not keep the event loop alive. After an
inquirer prompt released stdin, the next query let Bun exit with code 0
mid-query: `schema` never applied confirmed destructive changes, and
`admin` table views exited instead of showing results. Hold the loop open
for the duration of every query and transaction.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/lib/db-handler.ts

@@ -42,6 +42,21 @@ export function resolveClient(config?: BunMariaDBConfig): Bun.SQL | undefined {
     return grabMariaDBClient({ config });
 }
 
+/**
+ * Keep the event loop alive until `fn` settles.
+ * An idle Bun.SQL connection does not hold the process open, so a query sent
+ * on it after something else released the loop (e.g. an inquirer prompt
+ * releasing stdin) lets Bun exit silently mid-query.
+ */
+export async function holdEventLoop<T>(fn: () => Promise<T>): Promise<T> {
+    const timer = setInterval(() => {}, 1 << 30);
+    try {
+        return await fn();
+    } finally {
+        clearInterval(timer);
+    }
+}
+
 /**
  * Convert driver rows to plain objects.
  * - BigInt -> number (or string when outside the safe integer range)
@@ -88,7 +103,7 @@ export default async function dbHandler<
             throw new Error(`Couldn't grab MariaDB Client.`);
         }
 
-        const res = await CLIENT.unsafe(query, values);
+        const res = await holdEventLoop(() => CLIENT.unsafe(query, values));
 
         const count = res.count;
 

src/lib/mariadb/db-update.ts

@@ -1,4 +1,4 @@
-import dbHandler, { resolveClient } from "../db-handler";
+import dbHandler, { holdEventLoop, resolveClient } from "../db-handler";
 import type {
     BunMariaDBConfig,
     DBResponseObject,
@@ -103,7 +103,7 @@ export default async function DbUpdate<
          * all in one transaction. Re-fetching by id still works when the update
          * changes a column used in the WHERE clause.
          */
-        return await CLIENT.begin(async (tx) => {
+        return await holdEventLoop(() => CLIENT.begin(async (tx) => {
             const matched_res = await dbHandler<{ id: number }>({
                 query: `SELECT id FROM ${quoteIdentifier(table)} ${whereClause} FOR UPDATE`,
                 values: sqlQueryObj.whereValues as any,
@@ -162,7 +162,7 @@ export default async function DbUpdate<
                 },
                 db_res: res.db_res,
             } as DBResponseObject;
-        });
+        }));
     } catch (error: any) {
         if (error instanceof UpdateAbort) {
             return error.response;