[FIX] remove line problem in backup file

[anurag270102]

🔧 Description

This PR adds support for the -lponly flag in the export script.

The -lponly flag ensures that data is exported in line protocol format only, excluding metadata such as database creation statements and retention policies. This results in a lighter, faster, and more efficient export, especially for large datasets and migration use cases.

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✅ Changes

• Added -lponly flag to the influx_inspect export command
• Reduced unnecessary metadata from export files
• Improved export performance and reduced file size

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🚀 Benefits

• Faster export execution
• Lower CPU and disk usage
• Smaller backup files
• Better suited for InfluxDB 2.x and cross-environment migrations

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🔗 Reference

• https://docs.influxdata.com/influxdb/v2/install/upgrade/v1-to-v2/manual-upgrade/#migrate-time-series-data

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