NikitolProject 035879b7e6 feat(12-02): implement Argon2id KDF, rpassword prompt, and salt format support ...

- Add argon2 0.5 and rpassword 7.4 dependencies
- Implement derive_key_from_password() using Argon2id with 16-byte salt
- Implement prompt_password() with optional confirmation for pack
- Add resolve_key_for_pack() (generates random salt) and resolve_key_for_unpack() (reads salt from archive)
- Add FLAG_KDF_SALT (bit 4), SALT_SIZE constant, read_salt/write_salt functions to format.rs
- Relax flags validation to allow bit 4 (bits 5-7 must be zero)

2026-02-26 23:58:38 +03:00

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