devel/py-pyrate-limiter: Add py-pyrate-limiter 4.4.0

PyrateLimiter is a fast, async-friendly rate limiter for Python -- Leaky-Bucket
algorithm with pluggable backends.

Features:

• Leaky-bucket algorithm: smooth, well-understood rate limiting.
• Multiple rates at once: e.g. 5/second and 1000/hour on the same key.
• Per-key limits: track different services, users, or resources independently.
• Pluggable backends: in-memory, SQLite, Redis (sync and async), Postgres, and multiprocessing.
• Sync & async: the same API works in both; async paths never block the event loop.
• Direct calls or decorators: limiter.try_acquire(...) or @limiter.as_decorator(...).
• Blocking or non-blocking: wait for a permit (with optional timeout) or fail fast.