test(webapp): use findFirst over findUnique in triggerTask tests

Repo convention (and CodeRabbit path guideline) is findFirst over findUnique.
All are where:{id} lookups, so behaviour is unchanged. Leaves findUniqueOrThrow
as-is.

Author: d-cs

apps/webapp/test/engine/triggerTask.idempotency.test.ts

@@ -111,7 +111,7 @@ describe("RunEngineTriggerTaskService", () => {
     expect(result?.run.status).toBe("PENDING");
     expect(result?.isCached).toBe(false);
 
-    const run = await prisma.taskRun.findUnique({
+    const run = await prisma.taskRun.findFirst({
       where: {
         id: result?.run.id,
       },
@@ -315,7 +315,7 @@ describe("RunEngineTriggerTaskService", () => {
       expect(result?.run.friendlyId).toBeDefined();
       expect(result?.run.status).toBe("PENDING");
 
-      const run = await prisma.taskRun.findUnique({
+      const run = await prisma.taskRun.findFirst({
         where: {
           id: result?.run.id,
         },

apps/webapp/test/engine/triggerTask.test.ts

@@ -104,7 +104,7 @@ describe("RunEngineTriggerTaskService", () => {
     expect(result?.run.status).toBe("PENDING");
     expect(result?.isCached).toBe(false);
 
-    const run = await prisma.taskRun.findUnique({
+    const run = await prisma.taskRun.findFirst({
       where: {
         id: result?.run.id,
       },
@@ -306,7 +306,7 @@ describe("RunEngineTriggerTaskService", () => {
       });
 
       expect(result).toBeDefined();
-      const run = await prisma.taskRun.findUnique({ where: { id: result!.run.id } });
+      const run = await prisma.taskRun.findFirst({ where: { id: result!.run.id } });
       expect(run?.concurrencyKey).toBe("51262");
     }
   );