v1.3.0

• Add Retry::toPolicy(): RetryPolicy, so one builder configures both a closure runner (or a rasuvaeff/resilience pipeline) and Http\RetryingHttpClient. Only max attempts, backoff, jitter, sleeper and randomizer carry over; predicates, hooks, the stopAfterMs() budget and the clock stay client-constructor arguments (#28).
• RetryPolicy::fixed() / exponential() / fixedFor() / exponentialFor() accept an optional jitter: argument; default stays NoJitter (#28).
• Http\RetryingHttpClient: retryOnResponse is now optional and defaults to RetryDecisions::transient(); retryOnResponse and retryOnException may declare a third int $attempt parameter (1-based), passed only to closures that declare it (#28).
• Add Sleeper\FakeSleeper::advancing(FakeClock $clock, ?\Closure $onSleep = null): a test sleeper that advances the fake clock by every delay and runs an optional hook, so time budgets and other clock-driven state observe the sleep without a hand-written double (#27).
• Fix examples/retry_after.php: its request threw on getBody(), which the client has called since the body-rewind fix, so the example crashed after the first retry.