feat: platform backbone and field capture complete (checkpoint)

Platform backbone (plan 2026-10-13-plattform-rueckgrat), all tasks reviewed:
- webhooks with delivery table, retries and stable delivery id
- calendar handlers; a finished task removes its Outlook event
- tasks, automations, inspections, varroa, treatments, feedings,
  harvests, colonies, wintering, stock and bottling record domain events
  in the same transaction; legacy post-commit calls removed
- row locks through one helper (lockRowForUpdate, lockRowsForShare,
  lockRowsForUpdate)
- job framework with JobRun, cli exit codes, cleanup, task templates,
  daily evaluation, hourly app-backup and the rekey job
- system API and page "Verwaltung > System" with retry
- @nestjs/schedule removed, guard tests against in-process schedulers

Field capture T3 (plan 2026-10-13-t3-erfassung-am-stand), all tasks reviewed:
- inspection photo offline without metadata
- bulk capture for treatments, feedings and varroa (backend + frontend)
- offline stand mode with service worker, offline pages and packs
- offline session, cold start and logout on shared devices

Docs: ARCHITECTURE.md assumptions and sections updated, TASKS.md.
Gates: backend lint, typecheck, 1770 unit, 420 e2e, build, no schema
drift; frontend lint, typecheck, 913 tests, build. Not rolled out.

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

ApiCore-Frontend/src/lib/http/fetch-with-timeout.ts

@@ -2,6 +2,8 @@ import { reportRequestOutcome } from "../offline/connectivity";
 
 export const DEFAULT_TIMEOUT_MS = 4_000; // GET and writes with Idempotency-Key
 export const NON_IDEMPOTENT_WRITE_TIMEOUT_MS = 15_000;
+/** A bulk POST writes up to 100 records in one server transaction (15 s allowed there). */
+export const BULK_WRITE_TIMEOUT_MS = 15_000;
 export const UPLOAD_TIMEOUT_MS = 30_000;
 export const DOWNLOAD_TIMEOUT_MS = 60_000;
 
@@ -12,6 +14,12 @@ export function timeoutFor(method: string, headers: HeadersInit | undefined): nu
   return NON_IDEMPOTENT_WRITE_TIMEOUT_MS;
 }
 
+function isBulkPost(input: RequestInfo | URL, method: string | undefined): boolean {
+  if ((method ?? "GET").toUpperCase() !== "POST") return false;
+  const url = typeof input === "string" ? input : input instanceof URL ? input.href : input.url;
+  return /\/bulk(?:[?#]|$)/.test(url);
+}
+
 // Statuses that must not carry a body when a Response is rebuilt.
 const NULL_BODY_STATUSES = new Set([101, 204, 205, 304]);
 
@@ -86,8 +94,11 @@ export async function fetchReportingOutcome(
   input: RequestInfo | URL,
   init: RequestInit & { timeoutMs: number },
 ): Promise<Response> {
+  const timeoutMs = isBulkPost(input, init.method)
+    ? Math.max(init.timeoutMs, BULK_WRITE_TIMEOUT_MS)
+    : init.timeoutMs;
   try {
-    const response = await fetchWithTimeout(input, init);
+    const response = await fetchWithTimeout(input, { ...init, timeoutMs });
     reportRequestOutcome("reached-server");
     return response;
   } catch (error) {