added password hashing and ensured admin user exists

src/baby_monitor/utils/password.py

@@ -0,0 +1,33 @@
+"""Password hashing utilities using bcrypt."""
+
+import bcrypt
+
+
+def hash_password(password: str) -> str:
+    """Hash a password using bcrypt.
+
+    Args:
+        password: Plain text password to hash
+
+    Returns:
+        Hashed password as a string
+    """
+    salt = bcrypt.gensalt()
+    hashed: bytes = bcrypt.hashpw(password.encode("utf-8"), salt)
+    return hashed.decode("utf-8")
+
+
+def verify_password(password: str, hashed_password: str) -> bool:
+    """Verify a password against a hashed password.
+
+    Args:
+        password: Plain text password to verify
+        hashed_password: Previously hashed password
+
+    Returns:
+        True if password matches, False otherwise
+    """
+    result: bool = bcrypt.checkpw(
+        password.encode("utf-8"), hashed_password.encode("utf-8")
+    )
+    return result