v0.23.0 — Pantry: structured USED pull logs + move to /api/v1 service layer

Pantry now runs on the v1 API like Inventory/Animals: service layer in
src/lib/services/pantry.ts, pure logic + tests in src/lib/pantry/core.ts,
thin routes at /api/v1/pantry/* riding the items:* scopes. Pulls write
ItemLog type USED with a structured amount (queryable consumption).
Bulk-use runs its reads inside the transaction, accumulates repeated
pulls, and reports skipped items instead of silently dropping them —
the Pull dialog now surfaces those by name. Old /api/pantry routes
deleted.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

prisma/schema.prisma

@@ -420,6 +420,7 @@ enum ItemLogType {
   PURCHASED
   REPAIRED
   DISPOSED
+  USED // consumable pulled from the pantry; `amount` holds how much
 }
 
 model ItemLog {
@@ -430,6 +431,7 @@ model ItemLog {
   date      DateTime    @default(now())
   notes     String?
   cost      Decimal?    @db.Decimal(10, 2)
+  amount    Decimal?    @db.Decimal(10, 2) // quantity consumed, for USED logs (same unit as the item)
   actorId   String?
   createdAt DateTime    @default(now())