Module convert 

Legacy → v3 conversion utilities.

Two public functions are provided:

• convert_to_v3 – original API (same password for both sides; soft-deprecated)
• convert_to_v3_ext – new, flexible API with separate old/new passwords and 256-bit random generation

The new function is the recommended path for all real-world migrations.

Functions

convert_to_v3Deprecated

Legacy wrapper – 100% backward compatible with v0.1.5

convert_to_v3_ext

Recommended API – supports separate passwords and 256-bit random generation.