fix(suibets): restore fetchSeries guard, remove unused import, keep typed fetchPositions

- Add fetchSeries: false as const to capabilityOverrides (restores regression from main commit 6feaa86)
- Add params.series !== undefined early-return in fetchEventsImpl
- Remove unused isSuibetsRawOffer import (type guard lives in fetcher.ts)
- Keep PR's typed fetchRawPositions return (raw.createdOffers.map)

Author: elpou88

core/src/exchanges/suibets/index.ts

@@ -7,7 +7,7 @@ import {
 import { UnifiedMarket, UnifiedEvent, OrderBook, Position } from '../../types';
 import { AuthenticationError } from '../../errors';
 import { getSuibetsConfig, SuibetsApiConfig, RATE_LIMIT_MS, validateBaseUrl } from './config';
-import { SuibetsFetcher, SuibetsRawOffer, isSuibetsRawOffer } from './fetcher';
+import { SuibetsFetcher, SuibetsRawOffer } from './fetcher';
 import { SuibetsNormalizer } from './normalizer';
 import { fromOutcomeId } from './utils';
 import { FetcherContext } from '../interfaces';
@@ -46,6 +46,7 @@ export class SuiBetsExchange extends PredictionMarketExchange {
         fetchPositions: true as const,
         watchOrderBook: false as const,
         watchTrades: false as const,
+        fetchSeries: false as const,
     };
 
     private readonly config: SuibetsApiConfig;
@@ -95,6 +96,11 @@ export class SuiBetsExchange extends PredictionMarketExchange {
     }
 
     protected async fetchEventsImpl(params: EventFetchParams): Promise<UnifiedEvent[]> {
+        // Venue does not expose a series concept; honoring `params.series` by returning [] rather than ignoring the filter.
+        if (params.series !== undefined) {
+            return [];
+        }
+
         const raw = await this.fetcher.fetchRawEvents(params);
         return raw
             .map(r => this.normalizer.normalizeEvent(r))