- hashPassword now emits argon2id (same params as the legacy AtomCMS
Laravel setup: memory 64MB, iterations 4, parallelism 1)
- legacy md5 and bcrypt hashes are verified and auto-upgraded to
argon2id on successful login (CONVERT_PASSWORDS=true)
- replace BCRYPT_ROUNDS env with ARGON2_MEMORY_KB / ARGON2_ITERATIONS /
ARGON2_PARALLELISM
- update README and add tests for argon2id and bcrypt upgrade paths