feat(core): add retry for transient HTTP and stream-level errors

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Add retry mechanism driven by pi settings.json retry.provider config
(timeoutMs, maxRetries, maxRetryDelayMs).

HTTP-level retries handle 429/5xx with exponential backoff and jitter,
respecting Retry-After headers (seconds and HTTP-date formats).

Stream-level retries handle cases where the API returns 200 OK but
sends an error event in the stream body. Retries only when no content
has been emitted yet.

Per-attempt timeout via AbortController with automatic retry. Clean
abort propagation through the retry loop.

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jizhejiang

2026-06-02 11:38:10 +08:00

parent f48291f252

commit c3107dbc1c

7 changed files with 610 additions and 1995 deletions

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