feat: Phase 2 NASDAQ adapter for days-to-cover + 24mo history

- Add nasdaq SourceKind + nasdaqShortinterest KindHandler (kv_cache with nasdaq: prefix)
- Create NasdaqAdapter: calls api.nasdaq.com/quote/SYM/short-interest, parses settlementDate/sharesShort/daysToCover/avgVolume, returns 24mo history; handles non-NASDAq gracefully
- Register NasdaqAdapter in server index.ts adapters map
- Update shortInterest procedure: reads both yfinance + nasdaq caches in parallel, reconciles (NASDAQ for daysToCover/sharesShort, Yahoo for %float/shortRatio and NYSE fallback)
- Update ShortInterestPanel: display daysToCover, settlement date, source badges, 6-month history table, updated disclaimer
- Update trpc.ts client type for merged response shape

app/server/src/index.ts

@@ -5,6 +5,7 @@ import { fetchRequestHandler } from '@trpc/server/adapters/fetch';
 import { db } from './db/client.ts';
 import { createCacheRepository, type SourceKind } from './cache/CacheRepository.ts';
 import { YFinanceAdapter } from './adapters/YFinanceAdapter.ts';
+import { NasdaqAdapter } from './adapters/NasdaqAdapter.ts';
 import { SecFetchAdapter } from './adapters/SecFetchAdapter.ts';
 import { SecLintAdapter } from './adapters/SecLintAdapter.ts';
 import { XCookieAdapter } from './adapters/XCookieAdapter.ts';
@@ -18,6 +19,7 @@ const PORT = Number(process.env.PORT ?? 3001);
 const database = db();
 const adapters = new Map<SourceKind, SourceFetch>([
   ['yfinance' as const, new YFinanceAdapter() as unknown as SourceFetch],
+  ['nasdaq' as const, new NasdaqAdapter() as unknown as SourceFetch],
   ['sec-fetch' as const, new SecFetchAdapter(database) as unknown as SourceFetch],
   ['sec-lint-holders' as const, new SecLintAdapter(() => database, 'sec-lint-holders') as unknown as SourceFetch],
   ['sec-lint-insiders' as const, new SecLintAdapter(() => database, 'sec-lint-insiders') as unknown as SourceFetch],