Add CB, AVDV, and ISRA to market indicators

[IamJasonBian]

Summary

• Adds Chubb Limited (CB), Avantis International Small Cap Value (AVDV), and VanEck Israel (ISRA) to the INSTRUMENTS list and INSTRUMENT_NAMES map in market_indicators.py
• Once merged and the indicator fetch runs, these tickers will flow into the dashboard via the market-data blob store

Test plan

• Run python -c "from trading_system.market_indicators import fetch_and_write_indicators; fetch_and_write_indicators()" and verify CB, AVDV, ISRA appear in the output
• Confirm dashboard at route-runtime-service shows the new instruments

Loading

• Run locally without --live

[IamJasonBian]

To load the new tickers into the dashboard without running the trading bot:

cd /Users/jasonzb/conductor/workspaces/allocation-template/allocation-engine
python -c "from trading_system.market_indicators import fetch_and_write_indicators; fetch_and_write_indicators()"