ref(ourlogs): Add log size limit (#14635)

Source:
https://github.com/getsentry/relay/blob/795827327a79e2fb164037c58d16678267979e8e/relay-config/src/config.rs#L713

LOGS-280

Author: k-fish

develop-docs/sdk/data-model/envelopes.mdx

@@ -345,7 +345,7 @@ These limits are subject to future change and defined currently as:
 - *100MB* for a full envelope after decompression
 - *100MB* for all attachments combined
 - *100MB* for each attachment item
-- *1MB* for event (errors and transactions), span, and metric (statsd, buckets, meta) items.
+- *1MB* for event (errors and transactions), span, log, and metric (statsd, buckets, meta) items.
 - *100KB* for monitor check-in items
 - *50MB* for profile items
 - *10MB* for compressed replay item