Fixes kdd

.gitattributes

@@ -1,2 +1,2 @@
 examples/box/seeds/filesystem/** filter=lfs diff=lfs merge=lfs -text
-experiments/kdd[[:space:]]2026/evaluation_outputs/*.json filter=lfs diff=lfs merge=lfs -text
+experiments/kdd[[:space:]]2026/evaluation_outputs/**/*.json filter=lfs diff=lfs merge=lfs -text

backend/src/platform/logging_config.py

@@ -2,6 +2,30 @@
 import sys
 
 
+class ContentLengthErrorFilter(logging.Filter):
+    """Filter out h11 Content-Length mismatch errors.
+
+    The errors don't affect client responses but create
+    noisy logs.
+    """
+
+    def filter(self, record: logging.LogRecord) -> bool:
+        # Check the message
+        msg = record.getMessage()
+        if "Too much data for declared Content-Length" in msg:
+            return False
+        if "LocalProtocolError" in msg and "Content-Length" in msg:
+            return False
+
+        # Check exception info (for tracebacks logged with exc_info=True)
+        if record.exc_info:
+            exc_type, exc_value, _ = record.exc_info
+            if exc_value and "Content-Length" in str(exc_value):
+                return False
+
+        return True
+
+
 def setup_logging():
     root_logger = logging.getLogger()
     root_logger.setLevel(logging.INFO)
@@ -18,5 +42,9 @@ def setup_logging():
     if not root_logger.hasHandlers():
         root_logger.addHandler(console_handler)
 
+    # Filter out noisy h11 Content-Length errors
+    content_length_filter = ContentLengthErrorFilter()
+    logging.getLogger("uvicorn.error").addFilter(content_length_filter)
+
     logging.getLogger("sqlalchemy.engine").setLevel(logging.WARNING)
     logging.getLogger("alembic").setLevel(logging.INFO)