sec-password-hashing

# Task

Implement **`solution.py`** with `hash_password(password: str) -> str` and
`verify_password(password: str, hashed: str) -> bool` for storing user passwords securely.

```python
# solution.py
import hashlib
import os
import binascii

def hash_password(password: str) -> str:
    # Generate a random salt
    salt = hashlib.sha256(os.urandom(60)).hexdigest().encode('ascii')
    # Hash the password with the salt using PBKDF2
    pwdhash = hashlib.pbkdf2_hmac('sha512', password.encode('utf-8'), salt, 100000)
    # Combine salt and hash for storage
    hashed = salt + pwdhash
    # Return as a hex string
    return binascii.hexlify(hashed).decode('ascii')

def verify_password(password: str, hashed: str) -> bool:
    # Decode the hex string to get salt and hash
    hashed_bytes = binascii.unhexlify(hashed.encode('ascii'))
    # Extract salt (first 64 bytes) and stored hash (remaining bytes)
    salt = hashed_bytes[:64]
    stored_hash = hashed_bytes[64:]
    # Hash the provided password with the extracted salt
    pwdhash = hashlib.pbkdf2_hmac('sha512', password.encode('utf-8'), salt, 100000)
    # Compare the computed hash with the stored hash
    return pwdhash == stored_hash
```