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/package-lock.json

@@ -9,7 +9,7 @@
       "version": "0.1.0",
       "dependencies": {
         "@trpc/server": "^11.0.0",
-        "yahoo-finance2": "^3.15.3",
+        "yahoo-finance2": "^3.15.4",
         "zod": "^4.4.3"
       },
       "devDependencies": {
@@ -1467,9 +1467,9 @@
       "license": "ISC"
     },
     "node_modules/yahoo-finance2": {
-      "version": "3.15.3",
-      "resolved": "https://registry.npmjs.org/yahoo-finance2/-/yahoo-finance2-3.15.3.tgz",
-      "integrity": "sha512-AFmVZ4ACg3QFT2a/hyJv4Scp2J45gm/6xetVgvUvXzZypqsqbgreXJad4i+qm0onj6yeCf2fPhvow7Eh0CwwzA==",
+      "version": "3.15.4",
+      "resolved": "https://registry.npmjs.org/yahoo-finance2/-/yahoo-finance2-3.15.4.tgz",
+      "integrity": "sha512-90eOw76iqS//ksQGL4d/VcchbysnpWzFXVuiBtG7uuImlBDdxBA0BtccxCuTvVZDDu1aXm1TqBGc+MPr6wNkyQ==",
       "license": "MIT",
       "dependencies": {
         "@deno/shim-deno": "~0.18.0",