fix: backfill symbol_demand for sidebar-added symbols + analyst ratings schema fix

- Add await ctx.cache.subscribe() to addSymbol mutation so symbols
  added via the sidebar get registered in symbol_demand and yfinance
  jobs are queued immediately
- Backfill PEP, WYNN, STZ, CELH into symbol_demand + adapter_queue
- Upgrade yahoo-finance2 3.15.3 -> 3.15.4 and pass validateResult:false
  to quoteSummary() to handle Yahoo schema drift
- Add error detail logging for analyst ratings schema failures
- Update .gitignore with common ignores

app/server/src/trpc/context.ts

@@ -5,6 +5,7 @@ import { randomUUID, randomBytes, scryptSync, timingSafeEqual, createHmac } from
 import type { DatabaseSync } from 'node:sqlite';
 import type { CacheRepository } from '../cache/CacheRepository.ts';
 import type { AdapterQueue } from '../queue/AdapterQueue.ts';
+import type { XCookieAdapter } from '../adapters/XCookieAdapter.ts';
 
 export const SESSION_COOKIE = 'iflow_session';
 export const OAUTH_STATE_COOKIE = 'iflow_oauth_state';
@@ -21,6 +22,7 @@ export interface Context {
   db: DatabaseSync;
   cache: CacheRepository;
   queue: AdapterQueue;
+  xAdapter: XCookieAdapter | null;
   resHeaders: Headers; // mutable; procedures append Set-Cookie here (applied to Response by the fetch adapter)
   userId: string | null; // resolved from the session cookie; null = unauthenticated
   cookies: Record<string, string>; // parsed request cookies (session + oauth state)
@@ -102,13 +104,14 @@ export function verifyPassword(pw: string, stored: string): boolean {
 }
 
 // ----- context factory: 1f wires real db+cache; tests inject in-memory -----
-export function makeCreateContext(opts: { db: DatabaseSync; cache: CacheRepository; queue: AdapterQueue }) {
+export function makeCreateContext(opts: { db: DatabaseSync; cache: CacheRepository; queue: AdapterQueue; xAdapter?: XCookieAdapter | null }) {
   return ({ req, resHeaders }: CreateContextOpts): Context => {
     const cookies = parseCookies(req);
     return {
       db: opts.db,
       cache: opts.cache,
       queue: opts.queue,
+      xAdapter: opts.xAdapter ?? null,
       resHeaders,
       cookies,
       userId: resolveSessionUserId(opts.db, req),