feat(postgres): add error_logs collector

Add error_logs collector that starts immediately without DB connection.
Exports error_logs_receiver for loki.source.file integration.

Author: gaantunes

docs/sources/reference/compatibility/_index.md

@@ -234,6 +234,10 @@ The following components, grouped by namespace, _export_ Loki `LogsReceiver`.
 
 <!-- START GENERATED SECTION: EXPORTERS OF Loki `LogsReceiver` -->
 
+{{< collapse title="database_observability" >}}
+- [database_observability.postgres](../components/database_observability/database_observability.postgres)
+{{< /collapse >}}
+
 {{< collapse title="loki" >}}
 - [loki.echo](../components/loki/loki.echo)
 - [loki.enrich](../components/loki/loki.enrich)

docs/sources/reference/components/database_observability/database_observability.postgres.md

@@ -230,6 +230,7 @@ Replace the following:
 `database_observability.postgres` has exports that can be consumed by the following components:
 
 - Components that consume [Targets](../../../compatibility/#targets-consumers)
+- Components that consume [Loki `LogsReceiver`](../../../compatibility/#loki-logsreceiver-consumers)
 
 {{< admonition type="note" >}}
 Connecting some components may not be sensible or components may require further configuration to make the connection work correctly.