mroberts de38590f46 docs: add book tracker design spec and auth ADRs ...

Spec covers data model, API, auth, frontend, error handling, and testing.
ADR-0001 records PBKDF2 + pepper (FIPS) over argon2; ADR-0002 records
revocable server-side sessions over Flask's signed cookie.

2026-10-02 13:38:46 -05:00

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adr

docs: add book tracker design spec and auth ADRs

2026-10-02 13:38:46 -05:00