v1.0.0

• Initial release: closure-first retry with fixed/exponential/immediate backoff,
  jitter, time budgets, testable clock/sleeper/randomizer abstractions, hooks,
  and a PSR-18 decorator.
• Backoff strategies FixedBackoff, ExponentialBackoff, ImmediateBackoff
  with named factories Retry::fixed(), Retry::exponential(),
  Retry::immediate() and with* builder counterparts.
• jitter(float $factor, JitterMode $mode) selects a strategy via the
  Jitter\JitterMode enum (Additive/Full/None); factor applies only to
  Additive. AdditiveJitter is equal jitter (spreads downward only), so the
  backoff capMs stays a hard ceiling. Strategies AdditiveJitter,
  FullJitter, NoJitter can also be injected with withJitter().
• ExponentialBackoff clamps the delay before casting to int, so very high
  attempt numbers stay at capMs instead of overflowing to 0.
• Default retry triggers on any \Exception; \Error is not retried unless
  opted in with retryOn(\Error::class). retryOn() replaces the class list,
  while retryIf()/stopIf() layer predicates.
• retryIfResult(fn(mixed): bool) retries when the operation returns an
  unacceptable value without throwing; on exhaustion the value is exposed via
  RetryExhausted::lastException as an UnacceptableResult.
• Clock uses PSR-20 (Psr\Clock\ClockInterface); ships SystemClock and a
  mutable FakeClock with advanceMs() for tests.
• Retry::stopAfterMs(int) caps total wall-clock time across attempts; attempt 1
  always runs, follow-ups are skipped when elapsed + delay would exceed the
  budget (before the onRetry hook and the sleep). Elapsed time is measured
  after the operation runs, so a slow attempt counts toward the budget.
• AttemptRecord carries attempt, delayMs (null on the terminal record),
  elapsedMs, and exception. onRetry receives a single AttemptRecord;
  onExhausted receives the RetryExhausted exception.
• RetryExhausted exposes attempts, lastException, history, and reason
  (ExhaustionReason::MaxAttempts or ExhaustionReason::TimeBudget).
  Non-retryable exceptions are rethrown as-is.
• Http\RetryingHttpClient decorates any PSR-18 client. retryOnResponse and
  retryOnException both receive the RequestInterface (gate on method/
  idempotency); Http\RetryDecisions ships serverErrors(), rateLimited(),
  transient(), and an onlyIdempotent() wrapper. Honors Retry-After
  (delta-seconds and IMF-fixdate) via Http\RetryAfterParser; the server delay
  replaces backoff without jitter and is capped by maxRetryAfterMs (default
  300_000, null disables). Supports a budgetMs time budget and a
  retryOnException filter for transport failures. onRetry hooks receive
  Http\HttpAttemptRecord; onExhausted hooks receive Http\HttpRetryExhausted
  (carrying attempts + history, mirroring the closure path) and fire on every
  exhaustion. With throwOnExhausted: true that same Http\HttpRetryExhausted
  (implements ClientExceptionInterface) is thrown. Disable header handling with
  respectRetryAfter: false.
• No Result dependency: wrap Retry::run() with Result::fromThrowable() from
  rasuvaeff/result (or equivalent) to obtain a typed result value.