AI Dev Tool: H3metal Native MiniMaxH3

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Preview Code

```python
# AI Dev Tool: PostgreSQL Vector Search Extension with H3-metal Inference
# Description: A production-ready API Integration Wrapper for PostgreSQL Vector Search
#              with native MiniMax-H3 inference for Apple Silicon.

import os
import psycopg2
from psycopg2 import Error
from typing import List, Tuple
import numpy as np
from h3 import h3

# PostgreSQL connection settings
POSTGRES_HOST = os.environ.get('POSTGRES_HOST', 'localhost')
POSTGRES_DB = os.environ.get('POSTGRES_DB', 'mydatabase')
POSTGRES_USER = os.environ.get('POSTGRES_USER', 'myuser')
POSTGRES_PASSWORD = os.environ.get('POSTGRES_PASSWORD', 'mypassword')

# H3-metal inference settings
H3_RESOLUTION = 9

def create_postgres_connection() -> psycopg2.Connection:
    """
    Establish a connection to the PostgreSQL database.
    
# ... full runnable version includes tests & documentation