fix(connector-template): Address unused import and mismatched types in connector-template

[pixincreate]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates

Description

When add_connector.sh is called to generate new connector files mod.rs had an unused declaration, removed it. At the time of development, if needed, one can import it directly instead of pre-bloating the stuff.
Transformers.rs straight away failed and threw an error addressing mismatched types as it is expecting bool while were providing Result<bool, Error>.

Additional Changes

• This PR modifies the database schema
• This PR modifies application configuration/environment variables

connector-template/mod.rs
connector-template/transformers.rs

Motivation and Context

With the changes made, unexpected errors and warnings at the time of generation of connector code is avoided and addressed.

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed submitted code
• I added unit tests for my changes where possible
• I added a CHANGELOG entry if applicable