fix(api): Prefer Google qualified quote formats

[itswcl]

Summary

• try Google exchange-qualified formats before Yahoo fallback for plain stock symbols
• keep Yahoo quote/chart fallback behavior after Google-qualified attempts fail
• add regression coverage so raw AAPL can recover through AAPL:NASDAQ without touching Yahoo

Root Cause

Plain symbols like AAPL first hit Google as /quote/AAPL, which can return a beta page without the quote payload. The code then used Yahoo before trying Google-qualified formats like AAPL:NASDAQ, so Yahoo succeeded and became the visible source for most normal tickers.

Validation

• npm test -- --run src/services/ticker.service.test.ts
• npm run build
• live local service probe: AAPL, AMD, and QQQ now resolve to Google Finance :NASDAQ URLs