Add support for FlightAware dump1090-fa binary

Users building dump1090-fa from source (e.g., on Debian Trixie where
dump1090-mutability is unavailable) can now use it with ADS-B tracking.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

utils/dependencies.py

@@ -158,7 +158,7 @@ TOOL_DEPENDENCIES = {
                 'required': False,
                 'description': 'Mode S / ADS-B decoder (preferred)',
                 'install': {
-                    'apt': 'sudo apt install dump1090-mutability',
+                    'apt': 'sudo apt install dump1090-mutability (or build dump1090-fa from source)',
                     'brew': 'brew install dump1090-mutability',
                     'manual': 'https://github.com/flightaware/dump1090'
                 },