"""
Credential persistence interfaces and implementations for Mail Intake.

This package defines the abstractions and concrete implementations used
to persist authentication credentials across Mail Intake components.

The credential persistence layer is intentionally decoupled from
authentication logic. Authentication providers are responsible for
credential acquisition, validation, and refresh, while implementations
within this package are responsible solely for storage and retrieval.

The package provides:
- A generic ``CredentialStore`` abstraction defining the persistence contract
- Local filesystem–based storage for development and single-node use
- Distributed, Redis-backed storage for production and scaled deployments

Credential lifecycle management, interpretation, and security policy
decisions remain the responsibility of authentication providers.
"""

from mail_intake.credentials.store import CredentialStore
from mail_intake.credentials.pickle import PickleCredentialStore
from mail_intake.credentials.redis import RedisCredentialStore

__all__ = [
    "CredentialStore",
    "PickleCredentialStore",
    "RedisCredentialStore",
]