Add leaderboard stats, periodic updates via fastapi-utils (#724)

* add leaderboard stats, periodic update via fastapi-utils

* count label tasks for assistant and prompter replies

* Daily stats update every 15 mins, simplify leaderboard endpoint

* add indices for some created_date columns

* make user stats update intervals configurable

* make sure intervals are positive

oasst-shared/oasst_shared/utils.py

@@ -1,6 +1,32 @@
+import time
 from datetime import datetime, timezone
+from functools import wraps
+
+from loguru import logger
 
 
 def utcnow() -> datetime:
     """Return the current utc date and time with tzinfo set to UTC."""
     return datetime.now(timezone.utc)
+
+
+def log_timing(func=None, *, log_kwargs: bool = False, level: int | str = "DEBUG") -> None:
+    def decorator(func):
+        @wraps(func)
+        def wrapped(*args, **kwargs):
+            start = time.time()
+            result = func(*args, **kwargs)
+            end = time.time()
+            elapsed = end - start
+            if log_kwargs:
+                kwargs = ", ".join([f"{k}={v}" for k, v in kwargs.items()])
+                logger.log(level, f"Function '{func.__name__}({kwargs})' executed in {elapsed:f} s")
+            else:
+                logger.log(level, f"Function '{func.__name__}' executed in {elapsed:f} s")
+            return result
+
+        return wrapped
+
+    if func and callable(func):
+        return decorator(func)
+    return decorator