Add PSR-18 client resilience and header-setting decorators.#63
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RetryingClient retries network failures and 5xx responses with a configurable Backoff (FixedDelay or ExponentialBackoff with jitter), never retries 4xx, and reports every failed attempt to a RetryListener with its Elapsed duration and AttemptOutcome classification. Timeout statuses recognized by Code::isTimeout() (408 and 504) classify as TIMEOUT and stay retryable. Assembly goes through the fluent builder returned by RetryingClient::create(), which raises ClientNotConfigured without a client and resolves opinionated defaults otherwise. HeaderSettingClient sets headers on every outbound request, resolving each value at send time and omitting headers whose value resolves to an empty string. Duration measuring reuses tiny-blocks/time, now a direct requirement.
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RetryingClient retries network failures and 5xx responses with a configurable Backoff (FixedDelay or ExponentialBackoff with jitter), never retries 4xx, and reports every failed attempt to a RetryListener with its Elapsed duration and AttemptOutcome classification. Timeout statuses recognized by Code::isTimeout() (408 and 504) classify as TIMEOUT and stay retryable. Assembly goes through the fluent builder returned by RetryingClient::create(), which raises ClientNotConfigured without a client and resolves opinionated defaults otherwise.
HeaderSettingClient sets headers on every outbound request, resolving each value at send time and omitting headers whose value resolves to an empty string.
Duration measuring reuses tiny-blocks/time, now a direct requirement.
Summary
What this pull request does.
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composer reviewpasses.composer testspasses.