bump(langfuse-observability): fc96c149 → 6594a171 (#4444)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

.claude-plugin/marketplace.json

@@ -1848,7 +1848,7 @@
       "source": {
         "source": "url",
         "url": "https://github.com/langfuse/claude-observability-plugin.git",
-        "sha": "fc96c149b19ee6e06ba8f4806eab3a8c24d2f37c"
+        "sha": "6594a171ddf55e97590d2f5c4f9872fd66191c9e"
       },
       "homepage": "https://langfuse.com/integrations/other/claude-code"
     },