feat(reliability): idempotency store, custom webhook replay protection, correlation ids

Add LICENSE (MIT), an IdempotencyStore abstraction with a KV implementation and provider-scoped delivery keys, optional replay protection for custom webhooks (X-WebHooker-Timestamp + X-WebHooker-Nonce), and per-request correlation ids in webhook responses and logs.
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RhenCloud 2026-08-15 14:39:41 +08:00
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@ -94,7 +94,7 @@ Verifies the payload against the **group's** secret (KV `tenant:{groupId}`, gene
### Custom Webhooks
Any JSON payload signed with `X-WebHooker-Signature: sha256=<hex>` (HMAC-SHA256 of the raw body, group or global secret) becomes a `custom` event. Route it with a route whose filter is `event: custom`. Payload schema: see [Configuration → Custom webhooks](../guide/ingress.md#custom-webhooks).
Any JSON payload signed with `X-WebHooker-Signature: sha256=<hex>` (HMAC-SHA256 of the raw body, group or global secret) becomes a `custom` event. Route it with a route whose filter is `event: custom`. Optional `X-WebHooker-Timestamp` + `X-WebHooker-Nonce` headers enable replay protection (signature over `{timestamp}.{nonce}.{body}`, ±5 min window, nonce dedup). Payload schema: see [Configuration → Custom webhooks](../guide/ingress.md#custom-webhooks).
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