When -v is passed, test-sources.sh passes it through to go test -v.
sourcetest.Run uses testing.Verbose() to print the full manga list
from GetPopularManga and GetLatestUpdates, showing title + URL.
- .env.example documents all env vars with defaults (postgres creds, DATABASE_URL, TTLs, pool sizes)
- compose.yml reads postgres credentials and app config from .env via env_file
- .gitignore: track .env.example, ignore .env