Consolidate server utilities into shared module

- Add lib/server/utils/normalize.ts with normalizeTicker, normalizeTagsOrNull, nowIso, todayIso
- Add lib/server/utils/validation.ts with asRecord, asBoolean, asStringArray, asEnum
- Add lib/server/utils/index.ts re-exporting all utilities
- Remove duplicate lib/server/utils.ts (old file)
- Update all repos and files to use shared utilities
- Remove redundant ?? '' from normalizeTicker calls
- Update watchlist.ts to use normalizeTagsOrNull for null-return tags

lib/server/repos/tasks.ts

@@ -3,6 +3,7 @@ import type { Task, TaskStage, TaskStageContext, TaskStageEvent, TaskStatus, Tas
 import { db } from '@/lib/server/db';
 import { taskRun, taskStageEvent } from '@/lib/server/db/schema';
 import { buildTaskNotification } from '@/lib/server/task-notifications';
+import { nowIso } from '@/lib/server/utils';
 
 type TaskRow = typeof taskRun.$inferSelect;
 type TaskStageEventRow = typeof taskStageEvent.$inferSelect;
@@ -110,7 +111,7 @@ async function insertTaskStageEvent(executor: InsertExecutor, input: EventInsert
 }
 
 export async function createTaskRunRecord(input: CreateTaskInput) {
-  const now = new Date().toISOString();
+  const now = nowIso();
 
   return await db.transaction(async (tx) => {
     const [row] = await tx
@@ -219,7 +220,7 @@ async function attemptAtomicInsert(
 }
 
 export async function createTaskRunRecordAtomic(input: CreateTaskInput): Promise<AtomicCreateResult> {
-  const now = new Date().toISOString();
+  const now = nowIso();
 
   return await db.transaction(async (tx) => {
     const result = await attemptAtomicInsert(tx, input, now);
@@ -235,7 +236,7 @@ export async function setTaskWorkflowRunId(taskId: string, workflowRunId: string
     .update(taskRun)
     .set({
       workflow_run_id: workflowRunId,
-      updated_at: new Date().toISOString()
+      updated_at: nowIso()
     })
     .where(eq(taskRun.id, taskId));
 }
@@ -313,7 +314,7 @@ export async function findInFlightTaskByResourceKey(
 }
 
 export async function markTaskRunning(taskId: string) {
-  const now = new Date().toISOString();
+  const now = nowIso();
 
   return await db.transaction(async (tx) => {
     const [row] = await tx
@@ -354,7 +355,7 @@ export async function updateTaskStage(
   detail: string | null = null,
   context: TaskStageContext | null = null
 ) {
-  const now = new Date().toISOString();
+  const now = nowIso();
 
   return await db.transaction(async (tx) => {
     const [current] = await tx
@@ -403,7 +404,7 @@ export async function completeTask(
   result: Record<string, unknown>,
   completion: TaskCompletionState = {}
 ) {
-  const now = new Date().toISOString();
+  const now = nowIso();
 
   return await db.transaction(async (tx) => {
     const [row] = await tx
@@ -445,7 +446,7 @@ export async function markTaskFailure(
   stage: TaskStage = 'failed',
   failure: TaskCompletionState = {}
 ) {
-  const now = new Date().toISOString();
+  const now = nowIso();
 
   return await db.transaction(async (tx) => {
     const [row] = await tx
@@ -513,7 +514,7 @@ export async function setTaskStatusFromWorkflow(
       return toTask(current);
     }
 
-    const now = new Date().toISOString();
+    const now = nowIso();
     const [row] = await tx
       .update(taskRun)
       .set({
@@ -551,7 +552,7 @@ export async function updateTaskNotificationState(
   userId: string,
   input: UpdateTaskNotificationStateInput
 ) {
-  const now = new Date().toISOString();
+  const now = nowIso();
   const patch: Partial<typeof taskRun.$inferInsert> = {
     updated_at: now
   };