Self-Hosted Loki Alternative for Marketplace App Log Search (Signal Before Storage)

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The cheapest log search system is the one that preserves enough evidence to explain why a marketplace notification failed without making every retry look like a new incident. Fix the event shape, cardinality, and retention tiers first; then compare self-hosted search, a managed search cluster, and a hosted logs API against the same workload. Otherwise the vendor comparison measures noise. TL;DR: emit one structured delivery-attempt event per provider call, keep stable identifiers searchable, collapse retries when calculating alerts, and separate short-lived diagnostic payloads from longer-live

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