chore: tighten server-changes description

Author: matt-aitken

.server-changes/otlp-postgres-store-fallback.md

@@ -3,4 +3,4 @@ area: webapp
 type: fix
 ---
 
-Restore Postgres fallback for non-ClickHouse OTLP spans. Environments where runs carry a Postgres-backed taskEventStore (taskEvent / taskEventPartitioned) were receiving HTTP 500 from the OTLP ingest endpoints because the ClickHouse factory threw an error when passed those store values. The throw aborted the entire OTLP batch in #exportEvents. Non-ClickHouse stores are now routed directly to the Postgres eventRepository (matching the existing pattern in eventRepository/index.server.ts), and the ClickHouse factory call is wrapped in a try/catch that falls back to Postgres so any future unexpected store values degrade gracefully rather than failing the whole request.
+Fixes OTLP ingest endpoints returning HTTP 500 for runs on environments that use a Postgres-backed task event store. This caused the OpenTelemetry collector to drop entire span batches as non-retryable, resulting in real span loss.