feat: T4 wave 3 - notifications per user, suggestions API, varroa bands, split/queen events

- Schema III: per-user notifications (broadcast fan-out migration,
  category, link, requiredPermissions filter), notification preferences
  and settings endpoints, calendar withdrawal switch, occupiedFrames
- Suggestions API: list/summary with permission visibility and paging,
  accept/dismiss/reopen incl. bulk, SuggestionView on all responses
- Varroa traffic light by season and method, young colonies, treatment
  effect window, sample-based percentage; shared withdrawal-window helper
  on Berlin calendar days; GET /varroa-measurements/thresholds
- ColonySplit and QueenAssigned domain events with calendar and webhook
  handlers
- Outbox claims compare against now() rounded to timestamp(3); fixes the
  flaky e2e claims of rows written with SQL now()

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

ApiCore-Backend/src/common/outbox/outbox-claims.ts

@@ -71,9 +71,13 @@ function orderColumn(column: OutboxOrderColumn): Prisma.Sql {
 }
 
 /**
- * Claims up to `limit` due PENDING entries, oldest first. SKIP LOCKED lets
- * several workers claim side by side without waiting for or overlapping
- * each other. Returns the claimed rows (all columns) in claim order.
+ * Claims up to `limit` due PENDING entries, oldest first. "availableAt" is
+ * TIMESTAMP(3), so a value written from now() is rounded to the nearest
+ * millisecond - up to 0.5 ms ahead of the clock. Comparing against now()
+ * rounded the same way keeps such an entry due as soon as it is written;
+ * a plain now() would miss it for the first fraction of a millisecond.
+ * SKIP LOCKED lets several workers claim side by side without waiting for
+ * or overlapping each other. Returns the claimed rows (all columns) in claim order.
  * Uses the root client: a claim must commit on its own.
  */
 export async function claimBatch<Row>(
@@ -96,7 +100,7 @@ export async function claimBatch<Row>(
       UPDATE ${name} SET "status" = 'PROCESSING', "claimedAt" = now()
       WHERE "id" IN (
         SELECT "id" FROM ${name}
-        WHERE "status" = 'PENDING' AND "availableAt" <= now() ${filter}
+        WHERE "status" = 'PENDING' AND "availableAt" <= CAST(now() AS timestamp(3)) ${filter}
         ORDER BY ${orderBy}
         LIMIT ${options.limit}
         FOR UPDATE SKIP LOCKED