feat: T4 waves 1-2 - rule configs, schema, suggestions core, season, rule forms

- Rule configs with typed parsers and registry; Berlin day helpers
- Schema: T4 enums, Suggestion table, feed vocabulary (feedStatus as
  ColonyCondition with legacy text mapping), split queen source,
  varroa sample size; migration harness for data migrations
- SuggestionsService: propose/refresh/resolve/obsolete/expire,
  accept/dismiss/reopen incl. bulk, lock order, concurrency e2e
- SeasonService: phenology-based segments, inspection/varroa due dates,
  queen age; TimeEventsStep with JobPartialFailure
- Frontend: per-rule settings forms with visible value sources

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

ApiCore-Frontend/src/components/form/toggle-chip.tsx

@@ -7,15 +7,18 @@ interface ToggleChipProps {
   label: string;
   checked: boolean;
   onChange: (checked: boolean) => void;
+  /** Ids of a hint or error shown next to the tile. */
+  describedBy?: string;
 }
 
 /** A yes/no observation as a large tile; state shown by tick AND colour. */
-export function ToggleChip({ label, checked, onChange }: ToggleChipProps) {
+export function ToggleChip({ label, checked, onChange, describedBy }: ToggleChipProps) {
   return (
     <button
       type="button"
       role="checkbox"
       aria-checked={checked}
+      aria-describedby={describedBy}
       onClick={() => onChange(!checked)}
       className={cn(
         "flex min-h-11 items-center gap-2 rounded-lg border px-3 text-left text-sm motion-safe:transition-colors",