Problem

There's no timeout model in core; per-phase I/O timeouts are pushed onto each transport individually.

Proposed change

Add a Timeout value type (connect/read/write/request, read/write defaulting to request) using java.time.Duration. Translate to native settings in each adapter. Keep it independent of the retry total-timeout; document the separation.

Acceptance

• Timeout type in core
• Adapters translate to native
• Tests + apiDump

Dependencies

• Related Add a per-call options channel on the request context #27 — the per-call options channel carries a per-call timeout overlay using this type

Priority: medium · Effort: medium