fix(spans): Increase spans per segment limit to 1001 (#92395)

Relay currently enforces a limit of 1000 spans per segment, but that
does not count the transaction span itself. For this reason, we receive
a high number of errors for segments exceeding the maximum span count.

To silence this error for expected cases, we increase the limit to 1001
for now. Soon this limit will be further increased.

Author: jan-auer

src/sentry/spans/buffer.py

@@ -146,7 +146,7 @@ def __init__(
         span_buffer_root_timeout_secs: int = 10,
         segment_page_size: int = 100,
         max_segment_bytes: int = 10 * 1024 * 1024,  # 10 MiB
-        max_segment_spans: int = 1000,
+        max_segment_spans: int = 1001,
         redis_ttl: int = 3600,
     ):
         self.assigned_shards = list(assigned_shards)