fix: disable database query echo by default

[Akshay7483]

Summary

• Disable SQL query echoing by default.
• Keep FIREFORM_DB_ECHO=true available for explicitly enabling SQL query logging.
• Update the development Docker Compose default to match.

Testing

• Verified DB_ECHO = False when FIREFORM_DB_ECHO is unset.
• Verified DB_ECHO = True when FIREFORM_DB_ECHO=true.
• Validated docker/dev/compose.yml with docker compose config.
• Ran git diff --cached --check successfully.

[Akshay7483]

Thanks for reviewing! I’ve tested the configuration locally and verified that SQL query echoing is disabled by default while still allowing it to be enabled explicitly with FIREFORM_DB_ECHO=true.