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/package.json

@@ -3,11 +3,14 @@
   "version": "0.1.0",
   "private": true,
   "scripts": {
-    "dev": "next dev",
+    "dev": "HOSTNAME=0.0.0.0 next dev",
     "build": "next build",
     "start": "next start",
     "lint": "eslint",
-    "test": "node --test --experimental-strip-types \"src/**/*.test.ts\""
+    "test": "node --test --experimental-strip-types \"src/**/*.test.ts\" \"server/src/**/*.test.ts\"",
+    "test:server": "node --test --experimental-strip-types \"server/src/**/*.test.ts\"",
+    "typecheck": "tsc --noEmit",
+    "build:all": "next build && echo 'Backend build: TypeScript source — no separate build step needed'"
   },
   "dependencies": {
     "@radix-ui/react-dialog": "^1.1.17",