Fix daily cache gap fill using UTC instead of local time

The gapStart date was constructed with T00:00:00.000Z (UTC midnight),
causing it to land hours before local midnight. In PDT this meant
the gap fill re-parsed a partial slice of the previous day, and the
upsert replaced the full day with that partial data, losing cost.

Bump DAILY_CACHE_VERSION to 3 to force cache rebuild.

src/cli.ts

@@ -352,7 +352,11 @@ program
         }
 
         const gapStart = c.lastComputedDate
-          ? new Date(new Date(`${c.lastComputedDate}T00:00:00.000Z`).getTime() + MS_PER_DAY)
+          ? new Date(
+              parseInt(c.lastComputedDate.slice(0, 4)),
+              parseInt(c.lastComputedDate.slice(5, 7)) - 1,
+              parseInt(c.lastComputedDate.slice(8, 10)) + 1
+            )
           : new Date(todayStart.getTime() - BACKFILL_DAYS * MS_PER_DAY)
 
         if (gapStart.getTime() <= yesterdayEnd.getTime()) {

src/daily-cache.ts

@@ -4,7 +4,7 @@ import { mkdir, open, readFile, rename, unlink } from 'fs/promises'
 import { homedir } from 'os'
 import { join } from 'path'
 
-export const DAILY_CACHE_VERSION = 2
+export const DAILY_CACHE_VERSION = 3
 const DAILY_CACHE_FILENAME = 'daily-cache.json'
 
 export type DailyEntry = {