ADD: Adding public docs for live snapshot

Author: vinilivramento

databento/live/client.py

@@ -415,7 +415,9 @@ def subscribe(
         start : str or int, optional
             UNIX nanosecond epoch timestamp to start streaming from (inclusive), based on `ts_event`. Must be within 24 hours except when requesting the mbo or definition schemas.
         snapshot: bool, default to 'False'
-            Reserved for future use.
+            Request subscription with snapshot. The `start` parameter must be `None`.
+
+
 
         Raises
         ------

databento/live/protocol.py

@@ -278,7 +278,7 @@ def subscribe(
             UNIX nanosecond epoch timestamp to start streaming from. Must be
             within 24 hours.
         snapshot: bool, default to 'False'
-            Reserved for future use.
+            Request subscription with snapshot. The `start` parameter must be `None`.
 
         """
         logger.info(

databento/live/session.py

@@ -452,7 +452,7 @@ def subscribe(
             UNIX nanosecond epoch timestamp to start streaming from. Must be
             within 24 hours.
         snapshot: bool, default to 'False'
-            Reserved for future use.
+            Request subscription with snapshot. The `start` parameter must be `None`.
 
         """
         with self._lock: