feat: Add Python bindings via PyO3

[joshrotenberg]

Summary

Implements #563 - Python bindings for Redis Cloud and Enterprise APIs using PyO3.

Features

CloudClient (Redis Cloud API)

• Subscriptions (list, get)
• Databases (list, get)
• Raw API access (get, post, put, delete)
• from_env() with flexible env var support

EnterpriseClient (Redis Enterprise API)

• Cluster info, stats, license
• Databases (list, get, stats)
• Nodes (list, get, stats)
• Users (list, get)
• Raw API access
• from_env() constructor

Developer Experience

• Both async and sync APIs for all methods
• Type stubs (.pyi) for IDE autocomplete
• Proper error handling - Rust errors mapped to Python exceptions
• Comprehensive tests - 17 unit tests

Tested Against

• Redis Enterprise: Docker instance via docker-compose (cluster, nodes, databases, users, stats)
• Redis Cloud: Live account (subscriptions, databases across multiple subscriptions)

Usage

from redisctl import CloudClient, EnterpriseClient

# Redis Cloud
cloud = CloudClient.from_env()  # or CloudClient(api_key="...", api_secret="...")
result = cloud.subscriptions_sync()
for sub in result.get("subscriptions", []):
    print(f"{sub[\"id\"]}: {sub[\"name\"]}")

# Redis Enterprise  
enterprise = EnterpriseClient.from_env()  # or with explicit params
for db in enterprise.databases_sync():
    print(f"{db[\"uid\"]}: {db[\"name\"]}")

# Async
import asyncio
async def main():
    result = await cloud.subscriptions()
asyncio.run(main())

Building

cd crates/redisctl-python
pip install maturin
maturin build --release
pip install ../../target/wheels/redisctl-*.whl

CI

• GitHub Actions workflow builds wheels for:
  • Linux (x86_64)
  • macOS (x86_64, arm64)
  • Windows (x86_64)
• Runs 17 unit tests on Linux

Bug Fixes

This PR also fixes incorrect stats endpoint paths in redis-enterprise:

• /v1/bdbs/stats/{uid} (was /v1/bdbs/{uid}/stats)
• /v1/nodes/stats/{uid} (was /v1/nodes/{uid}/stats)

Technical Details

• PyO3 0.23 for Rust-Python interop
• pyo3-async-runtimes 0.23 for async/await (Tokio ↔ asyncio bridge)
• maturin for building wheels
• Crate excluded from default workspace members (requires Python dev headers)

TODO (follow-up work)

• Add more handlers (ACLs, connectivity, tasks, alerts, etc.)
• Add create/update/delete operations
• Publish to PyPI

Closes #563