Add optional toggle to display non-truncated job descriptions

[alikkaa]

Description

This PR introduces an optional configuration toggle RQ_DASHBOARD_SHOW_FULL_ARGS (available via the --show-full-args CLI option or environment variable).

By default, the "Description" column is truncated to a fixed length. However, for debugging purposes, users often need to see the complete arguments passed to a function. This change allows full descriptions to be displayed on demand.

The implementation uses rq.utils.get_call_string with max_length=None to retrieve the full string.

Backwards compatibility

This change is fully backwards compatible because truncation remains the default behavior.

Screenshots

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Type of change

• New feature (non-breaking change which adds functionality)

Checklist:

• I have performed a self-review of my own code
• My changes generate no new warnings