v1.0.0

Added

• Core state machine: CLOSED / OPEN / HALF_OPEN plus the operator
  overrides FORCED_OPEN, DISABLED and METRICS_ONLY (shadow mode).
• Sliding windows behind a SlidingWindow protocol, with count-based and
  time-based implementations selected via Config.window_type.
• Failure-rate trigger with failure_rate_threshold and
  minimum_number_of_calls, and slow-call detection via
  slow_call_duration_threshold and slow_call_rate_threshold.
• Lazy OPEN → HALF_OPEN transition with a probe limit and a concurrency cap.
• Single public CircuitBreaker for sync and async, usable as a decorator, a
  sync/async context manager, and breaker.call(fn, ...). Decorators preserve
  the signature and sync/async nature via ParamSpec + @overload.
• Manual control: reset(), force_open(), disable(), metrics_only().
• Registry of named breakers with a shared default config and per-name
  overrides.
• Immutable Config (frozen dataclass) with eager validation.
• FailureClassifier protocol with a default policy (any raised exception is a
  failure); classification by result is supported by custom classifiers.
• CircuitOpenError carrying the breaker name, an estimated retry_after, and
  the last recorded failure.
• Async-first timeout primitive that turns a hang into CallTimeoutError.
• Observability: EventListener protocol, a zero-dependency
  LoggingEventListener, and an OTelEventListener (extra interlock-cb[otel]).
• httpx2 transport integration (extra interlock-cb[httpx2]):
  CircuitBreakerTransport and AsyncCircuitBreakerTransport apply a breaker
  per host, with an HttpStatusClassifier treating 429, 500, 502, 503, 504
  and transport exceptions as failures.
• InterlockDeprecationWarning (subclasses UserWarning, visible by default).
• py.typed; strict mypy and pyright; 100% test coverage.