Fix LOG_LEVEL environment variable not being respected

- Read LOG_LEVEL from environment with INFO as default
- Use getattr to safely convert string to logging level constant
- Supports DEBUG, INFO, WARNING, ERROR, CRITICAL levels
- Falls back to INFO if invalid level specified

This minimal change allows debug logs to appear when LOG_LEVEL=DEBUG
is set in the .env file, fixing the issue where debug messages were
being filtered out.

python/src/server/config/logfire_config.py

@@ -110,9 +110,12 @@ def setup_logfire(
     if not handlers:
         handlers.append(logging.StreamHandler())
 
+    # Read LOG_LEVEL from environment
+    log_level = os.getenv("LOG_LEVEL", "INFO").upper()
+    
     # Configure root logging
     logging.basicConfig(
-        level=logging.INFO,
+        level=getattr(logging, log_level, logging.INFO),
         format="%(asctime)s | %(name)s | %(levelname)s | %(message)s",
         datefmt="%Y-%m-%d %H:%M:%S",
         handlers=handlers,