feat(infra): add multi-region deployment and failover strategy (#620)#695
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…code#620) Implement an active/warm-standby two-region topology by composing the existing single-region Terraform modules with aliased providers. - tf/multi-region: full stack (networking, compute, storage, monitoring) in primary + secondary regions - modules/dns-failover: Route 53 health checks + active-passive failover - modules/replication: S3 cross-region replication (uploads, backups) - modules/database-replica: cross-region RDS read replica + standby Redis - infra/scripts: failover.sh (promote/scale/failback), failover-drill.sh, validate-multiregion.sh - dr/: data-replication strategy + multi-region deployment runbook - add db_instance_arn output; required_providers in each module Validated with terraform fmt + validate (single- and multi-region). Closes rinafcode#620
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rinafcode#615) Implement reliable outbound webhook delivery on the existing webhooks worker: - webhook-backoff.util: exponential backoff with equal jitter + max cap, and retryability classification (5xx/408/425/429/transport = retry; 4xx = permanent) - webhook-delivery.service: HMAC-signed HTTP POST; retryable failures throw so Bull re-enqueues with backoff (retry queue); permanent/exhausted -> dead-letter - webhook-monitor.service: failure counters + CustomMetrics/alert + events - webhook-retry.config: env-overridable maxRetries/delays/jitter/timeout - wire WebhooksWorker to the delivery service (optional-dep fallback for the orchestration pool); register WebhooksDeliveryModule Tests: 19 unit tests (backoff math, retry vs dead-letter, HMAC, job options). Closes rinafcode#615
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Implement an active/warm-standby two-region topology by composing the existing single-region Terraform modules with aliased providers.
Validated with terraform fmt + validate (single- and multi-region).
Closes #620