[zhjwpku]

Configure REST transport through rest.client.* properties for connection and socket timeouts, retry limits, user-agent and idempotency-key lifetime. Apply initial and merged catalog properties through the client factory, preserving custom factories and the existing timeout constructor.

Use Java's three-minute default connection timeout and zero-value timeout semantics. Enforce response inactivity deadlines in milliseconds with a synchronous libcurl transfer loop, without an additional executor.

Authenticate once and replay the same request across retries. Decide HTTP status retries after headers and before reading the entity. Honor Idempotency-Key for retry-safe requests and bound keyed retries by the first-send time and maximum next interval, including Retry-After or jitter. Parse key lifetimes as ISO-8601 durations with Java-compatible handling of invalid and non-positive values.

Retry eligible request-execution I/O failures without a delay. Propagate final response-body failures without replaying the request. Preserve redirect protection, transfer-error reporting and commit-state-unknown handling. Saturate oversized Retry-After conversions without overflow and avoid echoing malformed OAuth token responses.

Document the transport policy and add regression coverage for retry rules, key lifetime budgets, stable authentication, timeout precision and duration boundaries.