fix: import error while generating migrations (#630)

Co-authored-by: Jianguo Ren <renjianguo666@gmail.com>

Author: Harshal6927

advanced_alchemy/types/password_hash/passlib.py

@@ -2,11 +2,10 @@
 
 from typing import TYPE_CHECKING, Any, Union
 
-from passlib.context import CryptContext  # pyright: ignore
-
 from advanced_alchemy.types.password_hash.base import HashingBackend
 
 if TYPE_CHECKING:
+    from passlib.context import CryptContext
     from sqlalchemy import BinaryExpression, ColumnElement
 
 __all__ = ("PasslibHasher",)
@@ -19,7 +18,7 @@ class PasslibHasher(HashingBackend):
     Install with `pip install passlib` or `uv pip install passlib`.
     """
 
-    def __init__(self, context: CryptContext) -> None:
+    def __init__(self, context: "CryptContext") -> None:
         """Initialize PasslibBackend.
 
         Args:

advanced_alchemy/types/password_hash/pwdlib.py

@@ -5,17 +5,16 @@
 from advanced_alchemy.types.password_hash.base import HashingBackend
 
 if TYPE_CHECKING:
+    from pwdlib.hashers.base import HasherProtocol
     from sqlalchemy import BinaryExpression, ColumnElement
 
-from pwdlib.hashers.base import HasherProtocol
-
 __all__ = ("PwdlibHasher",)
 
 
 class PwdlibHasher(HashingBackend):
     """Hashing backend using Pwdlib."""
 
-    def __init__(self, hasher: HasherProtocol) -> None:
+    def __init__(self, hasher: "HasherProtocol") -> None:
         """Initialize PwdlibBackend.
 
         Args: